Personally, I set my limit to buying 3 to 5 books a month. Not because I couldn't afford more, but my interests in books, authors and genres shifts every now and then.

Last year, I was really into magic realism, not soon after in late Victorian fiction, Modernism and then Gothic Fiction. This year started with a deep adoration for American novels of the 20th century - mostly William Faulkner - and just a week ago, I fell in love with Pynchon's the Crying of lot 49.

So, just go with the flow and embark into your wonderful journey of discovering books. Pick what captivates you most at a given time and more books will follow.