I was once in a library and randomly picked up a book, read the blurb, had a chuckle and put it back down. But years later, I still remember it and would actually like to read it, but have no idea what it is. What I can remember:

- It was a post-Dan Brown Da Vinci Code style ripoff, as was popular in the mid-aughts.
- Think it was a female writer
- Seem to remember the story involved a young woman starting a job at an ancient private bank in London, which obviously held dark secrets
- Some sort of conspiracy was definitely involved