A friend bought me a book for my birthday as inspiration. Ultramarathon Man by Dean Karnazes. Read this book while away at Christmas. Loved it, decided when I got home to buy he's other books. I just recently finished Run and part way into 50/50. What other books out there are just as inspirational?
Also another book I have really enjoyed recently was Ranulph Fiennes Autobiography - Mad, Bad & Dangerous to know.