Olivia Joules and the Overactive Imagination - Helen Fielding
Olivia Joulles is not a book that gets off to the best of starts, but you need to put your apprehension aside and read it, damn you!

I have to admit that I love this book. Sadly, I don't own it (hints, people). It's a tale of a very overactive imagination in the hands of a journalist. I must admit to having similar thought processes to those mentioned in this book whereby Olivia assumes that seemingly normal people are spies and terrorists out to get her. Of course, this wouldn't be quite so brilliant if it didn't turn out that some of her crazy imaginings came true!