i dont know about a book but every year they cover the western states in their magazine, breaking diff units down, showing odds and stats. are you planning on an elk hunt this fall? idaho and colo will be you go to spots for otc tags. im not sure but i think oregon has otc tags as well, dont mark my words on that though. welcome to the forum, you will enjoy it here. ps... welcome to the elk woods! you will never forget it.