When I first stepped into the hallowed streets of the City of London as a callow 21 year old PPE graduate fresh out of Oxford, I only ever intended to stay for a few years. From when I was a little girl, I had always wanted to be a writer. Corporate life was a means to that end.

In the City, I had two objectives: a) to make as much money as I could legally in as short space of time as possible, and b) to prove a point to myself and whoever I fancied might be watching.

The City lured you in with the promise of money but it had another USP that appealed to my young and foolish ego: it prided itself on its hair-cloth-shirt toughness, insinuating that you had to be something of a superhero to survive let alone thrive.

There weren’t any super heroines back then in the American investment bank I went to work for. I was the first woman they employed in European corporate finance. Back then, the glass ceiling was at entry-level and I was thrilled to have smashed it.

I didn’t think of myself as super-heroine but as a survivor. The work was an intellectual challenge, prospering in that environment was a psychological challenge and not becoming habituated to the money washing around me was perhaps an ethical and moral challenge.

Dealing in astronomical sums of money and being lavishly rewarded can be very corrupting, can lead you to think that you deserve the money, that you are entitled to the money, and that you need that amount of money to live a satisfactory life.

I was determined not to buy into all that. I bought a flat in an unfashionable part of Chelsea with a mortgage that my city salary and bonus would enable me to pay off within a few years, and a 10-year-old entry-level BMW that I would be able to afford to keep when my City days were over.
I cycled to work every day, partially to keep fit, partially to save money.

I had a plan and I stuck to it. I deviated occasionally and allowed myself indulgences, but the greatest indulgence of all is time and money buys time. After seven years as a leveraged buyout and high-risk specialist, it was time to leave.

I had for several years been searching for a plot, and then, one day, I was sitting at my desk, feeling particularly annoyed with my boss, and wondering idly how much trouble I could cause financially, when the bare bones of a story leapt into my head.

It was a totally illegal plan, it would have made a lot of money, but I like to sleep easy at night, and so instead of doing it, I wrote about it. After six months, I knew that this plot could turn into a book.

I was young, free, and single. After seven years I had saved up enough money. It was time to take a risk, to turn my back on my large six-figure salary and bonus, and the status and security that went with it.

I remember the day I handed in my notice. I felt as if I had jumped out of an airplane without a parachute. It seemed like I was in freefall for weeks afterwards. It was a gloriously heady feeling.

I wrote for 18 months, refining the plot until it was time to test the reality of my dream. Through a friend of a friend I was introduced to a literary agent. I went to see him, handed over my manuscript. It was a Thursday.

Then in some strange feat of serendipity, a kind of fortune favours the brave moment, a bizarre thing happened over the weekend.

About four months earlier, I had written a speculative letter to the Sunday Times, where I suggested writing an article about my experiences in the City. I was contacted a few weeks later by the editor of the Sunday Times Magazine who said absolutely, yes please, do write an article for us about what it is like to be a woman in that extremely testosterone-fuelled environment.

So I did. I was then summoned to a photo shoot that involved me, a gorgeous pinstriped Ralph Lauren trouser suit, and ten male models.
I had no idea when the article would appear, but, as luck would have it, it came out, covering six pages, on the Sunday immediately following my Thursday meeting with the literary agent.

This produced two rather wonderful and wholly anticipated results: one, an auction ensued amongst a number of publishing houses to buy my novel and two, I was contacted by about six different highly prestigious and successful financial boutiques and offered jobs (I have to say at this point, nothing in my article suggested that I wished to return to finance.)

This was 20 years ago. The book was Nest of Vipers – an adrenaline fuelled insight into the life of an investment banker, Sarah Jensen, who was recruited by the Governor of the Bank of England to go undercover in her investment bank to investigate an insider-trading ring that stretched from a central bank to the Mafia. Unbeknownst to her, she was also working for MI6. The novel went on to be published in over thirty territories and to be optioned three times for movies.

I am now on book number 13. Jumping out of my investment banking career had been a risk worth taking on every level.

I suspect that a number of you reading this are contemplating or have contemplated leaving the corporate system and so my advice to you would go along the following lines:

* While you are inside the system, be wary of buying into it and into the lifestyle to match it if you are intending to leave it, particularly in highly paid professions such as investment banking. Investment banking is a great way to amass your f… you money, what I more politely refer to as my running away money, but only if you do not spend like an investment banker.

* Many women in corporate life can still in some ways feel like outsiders. As the first woman employed by Bankers Trust’s European corporate finance department, I was patently and obviously an outsider and always felt like one. That was a real advantage. Relish and use that feeling. It gives you perspective, the ability to stand aside and look at your position and your broader options in the outside world and gives you greater flexibility in terms of the choices you might go on to make. There is no wonderfully set career path stretching out ahead of you. You have far greater freedom to make it up as you go along. Going forward, I would definitely like to see more financial seminars lead by women that address this need for equality in the world of finance. Above all, education is key and marketing these kinds of seminars would ensure that they are a success and that more women are given opportunities within the financial sector.

It’s been shown in personality tests/behavioural profiles that entrepreneurs are overwhelmingly outsiders. Being too wedded to corporate life can blunt your desire and ability to take risks with your career. Being an able quantifier of risk for your organisation often does not extend to being able to quantify risk as regards your own life.

I’m a contrarian by nature and it’s led to some odd but potentially beneficial opportunities: the first was my Sunday Times article which I had thought was a very public exercise in boat-burning, in deliberately removing any fallback position, any hint of a Plan B should Plan A fail. I believed that the very absence of a Plan B would make me work harder to ensure Plan A worked!

How contrary was it then that my article and my attitude produced all these offers. I’m sure had I gone knocking on their doors the week before those same doors would have remained closed to me.

This leads me to a wider point. On several notable occasions in my career both as an investment banker and as a writer, it’s only when I have been prepared to turn my back on my dreams and relinquish them that various huge opportunities have suddenly materialised. Over a period when I lived in the Middle East, when I was far from my markets, unable to write the kind of intelligence world meets financial world thrillers that were my staples because of local sensitivities, I came to the conclusion that though I deeply loved writing, not just as a career but as a vocation, it was time to think about embarking on a third career.

I decided to take it easy for a week and drink coffee, read some good books, have a chance to spend more time with my friends during the school day, all that good stuff, when two things happened…. I got an email from an agent based in New York called David Vigliano saying he had read my books and was very interested in discussing representation with me. I also got an email from a Hollywood-based movie producer who wanted to enter into an agreement with me to option some books of mine for movies.

I decided that as cosmic messages go, this was a pretty big one and that my future was as a writer. So it has proved so far, and long may it continue to prove I hope and pray.

Perhaps grasping onto a desire too tightly will always mean that achieving it is outside your reach whereas if you can let go and be more open minded, things will come to you. I know it sounds rather mystical, but the above experiences are too powerful for me to dismiss it!

Being an author these days really means that you are an entrepreneur so a lot of my experiences and the lessons I have drawn from them can be applied across the spectrum to different areas of entrepreneurship besides writing. I hope some of these above might be of help. For those of you who are budding writers here are a few tips that have helped me.

* Write a whole draft before you begin editing. Writing and editing at the same time is a dispiriting and inhibiting process. Just get the first draft down and then you can play around with it.

* Make use of the most current technology to help you. I don’t type really well or very quickly but I have always typed out my novels on my desktop computer. However, just over a year ago, an old friend of mine who is an investigative journalist told me I was mad not to write about the story of my kidnap and detention in Iran. I started to think about it, suggested it to my agent who leapt at the idea. He said, look if you can write it in the next two months, we can publish it at the same time as your latest thriller, Ark Storm, which was due to be published nine months later.

* Ensure that you have financial resources to fall back on. No matter what age you decide to retire, or which sector you work in, planning for the financial aspects of your retirement is fundamental. Your income from writing can be sporadic. However, there are a few different retirement plan options out there and so everything can, at times, seem overwhelming. For example, do you have plans for an Individual Retirement Account in place? Or will you be relying on your 401k? Ultimately, doing your research can help make things a little easier. If you would like to learn more about managing an IRA and want to know how much you could contribute per year, take a look at this useful guide from the SoFi website: https://www.sofi.com/roth-ira-calculator/.

Two months is a tight deadline, especially for someone who cannot type very well. So I did something I had been contemplating for a while. I installed DragonDictate voice recognition software on my computer. And I dictated the book, the memoir, which would go on to be called Hostage, Kidnapped on high seas, the true story my captivity in Iran. And I discovered a very welcome side benefit. I had wanted this memoir to sound much more intimate than my novels. I wanted it to read as if it were a tale being told at a dinner party perhaps to someone I had just met, one of those rare and special human beings who manage to elicit the most candid of confessionals.

And it worked. The act of dictating bypassed the overthinking intellectual part of my brain and turned out to be some of the best writing I have ever done. Instead of having to do my customary ten drafts I did only three.

If you are writing Instead of dictating, still read your work aloud. You will pick up many infelicities and awkwardnesses in the writing that silent reading and editing just will not detect.

We all know the maxim, write what you know, but also research and use what you know. Dictate great snatches of fabulous dialogue which you have heard in the workplace into your phone and then email them to yourself to save them and use them. This hones your ear for dialogue and also keeps fresh the characterising lexicon of whatever workplace you happen to be in and will render your book much more immediate and real to readers.

Remember, everything is material. Especially any terrible bosses. You can make sure they come to a spectacularly unpleasant end in your novel.

As I found during my seven years in the City, there’s always a silver lining.