Well okay, it was partly fueled by needing to buy lunch and the necessity to get something else in order to get past the minimum spend for my debit card, but still... it didn't have to be a book, and didn't have to be this book, but it was. So there it is.
It initially caught my notice because it had Alistair Maclean's name on it, but it was only the story outline that he wrote - the book itself was written by Alistair Macneill (yes, took me a while to realise it was a different Alistair!). The book is in the UNAC series, and it's called Code Breaker. Exactly where it will slot in with the other books on my read list in terms or the order I read them in, I don't know... will depend on my mood at the time I guess!