I find books I think mostly when I see them in a charity shop and either they look cool or I dimly remember one of my friends having once said they were fun, when they're recced by my core group of twitter friends (we all have very similar tastes, and tend to bounce a book rec around for a while with everyone chiming in) or from my friend Joe in our longrunning game of forcible book swapping. I also get recs and loans from other RL friends too, mostly via TolkSoc.