There are a few books that are prized by chameleon keepers. And my pick for day 12 is two of the best! Both Chameleons of Africa by Colin Tilbury and Mader's Reptile Medicine and Surgery by Divers and Stahl are excellent parts of a chameleon keeper's library! They are high end books so chances are that the chameleon person in your life may not have picked them up yet! You can check them out here.