This deduction marks an important milestone for this blog.
I learned quite a few things from this picture. Most of them were not facts about the owner of the bookshelf, but creative ways of finding information and, more importantly, confirming it.
For starters, I am a huge Dan Brown fan. In fact, I own all of his novels. The thing is, I didn't recognize the ones on your shelf - at least I didn't at first. That's not the American cover art. Based on that, and the AA driving manual/practice book, I feel same in assuming that you are the first non-American to submit a picture to my blog, and for that I am immensely grateful. Add the interesting fact that the picture arrived on the submission page approximately 7 hours after it was taken (time zone difference), and I deduce that you live in the UK (the Doctor Who books helped too).
Next, let's narrow down physically who you are. I'm operating under the assumption that you are male based on your interest in role-playing games (bottom shelf on the left), your music (metal, if I'm not mistaken), and your ownership of lighter fluid and accessories for a bee-bee gun. That being said, you could also be a statistically uncommon female, but the balance of probability says otherwise. You are almost certainly Caucasian (30 SPF sunblock in the UK), and you are a swimmer( although whether it's for a club, your school, etc. - I cannot be sure).
Based on your literary interests and the books referencing eating on a budget, student cooking, etc., I'm placing your age somewhere in the university range. It's likely that you live in a small apartment/flat (terminology is fun) for two reasons: The first is that, while I am unfamiliar with dorm living over there, I would assume that bringing your own bookshelf is hard to do. The second is your bike pump. There are many places where a person with a lot of space to work with could keep a bike pump - the top of a bookshelf doesn't seem like one of them.
You are interested in computers (potentially a university major), puzzle solving, and different methods of thinking (explaining your participation in the blog). You enjoy mysteries, and figuring things out firsthand.
Finally, I have some questions. Are you a magician? That seems to be a lot of decks of cards, even for someone who plays table-games. What in the world is that green slime-looking stuff in the small bucket?
Thanks for submitting! I await your response!