50/50 Secrets I Learned Running 50 Marathons in 50 Days-and How You Too Can Achieve Super Endurance by Dean Karnazes

50/50 is Dean Karnazes new book.  I'll have to say that it was not nearly as good as his first book Ultramarathon Man, but it was still a good read, especially for active runners.  This book is more of a runner's guide as opposed to his first book which I thought was more of a inspirational narrative of his life.  He goes through each marathon that he runs and provides a lot of good tips and advice from his experiences.  Great tips for runners of all levels.  I would definitely recommend it for anyone who wants to know more about running.