An Abundance of Katherines Resources
Websites
Relationship Formula
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How do your break-ups stack up compared to Colin's? Plug them in to his theorem.
Anagrams for Sam Ragan
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Okay, Sam Ragan isn't particularly relevant, but if you want to play around with anagrams, then this is the site for you.
Articles and Interviews
Mind Boggling
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An interview with author John Green about why and how the wrote the novel.
Numbers Game
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If you want to know more about why Green chose nineteen girlfriends, or what the deal with tampon strings is, find out in these FAQs about the book.
Video
Vlog Brothers
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John Green doesn't just have ideas about math and relationships—he also has something to say about other topics in his video blog.
Audio
No Reading Required
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An audio version of the book… read by somebody named Kathryn (way to spice up the spelling).