I admit I’m biased:  I pretty much love all Steve Jenkins’ books.  The one limitation of this one is that it is limited to very young students.  It is set up as a guessing book: a two page spread illustrates many features of a particular animal and asks, “Who Am I?” and the following two page spread answers the question, showing an illustration of the whole animal.  The guessing part is really targeting PreK-K kids, as the features given as clues make the guessing pretty obvious.  The predictability and illustrations to support the text extend the usefulness to emergent readers in first grade.  There are some information pages in the back that add a little more meat to the substance offered on each animal.