Approximately 55 books bought at a cost of £75 during 2015. £0.99-£1.99 books in the sales are my favourite kind. Consequently just started this year buying 15 books in the 12 days of Kindle sale for £21.
I'm good at only buying books on sale, but I don't have a huge amount of spare cash and am generally very careful with my spending in general. So the fact I've still got a ton of unread books to wade through and don't need these books isn't terribly clever.