I'm a big SK fan - can't believe I missed this when it first came out! The book is great. Lots of buildup - as a runner and a walker, I can relate to a lot of the pain these guys feel - I can't imagine walking 4mph for 1 mile, much less the several hundred they end up doing. Spoiler Alert - I hated the ending. Lots of buildup then it just ended. No resolution, no reaction - other than that, great book.