Living on an island that is 80% state park means we have an abundance of small critters running around the neighborhood. Mr. Toady makes regular appearances in the garden as do the slugs. (They're disgustingly HUGE - even for me!) We've also seen foxes in the backyard as well as a coyote early one morning this past winter.
S finds them all incredibly interesting, so it is no surprise that Jerry Pallotta's books are his current favorites. (Before you decide he is a complete geek at three and a half, he also asks for Dora's Fairy Tale Adventure at least three times a day...) You'll either love Jerry Pallotta's books or you'll hate them. We love them. S is not-so-much interested in the alphabet part as he is into the factual information about each creature. There is just enough on each page to interest him but not so much as to be overwhelming.
We actually own quite a few of his books - eleven to be exact. I thought I owned most of them, but he's been busy. Since I bought these (years ago to use in school, before I had children) he's come out with a ton more. Now if I could just get S to leave the slugs alone.... Have you ever tried to wash slug slime off?