I'm a well read grad student who's bluntly honest about all things, although I try to be most honest about myself.
At least in parts. Claiming that cats are the 'sleepiest' animal is wrong. Koala's are at least as sleepy as cats, and the average time cats spend sleeping varies online, as does information on all other animals. (I trust National Geographic most of the sources I found, and they don't have the average sleep of cats, but Koala's are around eighteen, which is the highest the author gives this cat at sixteen to eighteen hours a day. I've heard before that Koala's can sleep up to twenty two hours a day, and the save the Koalas site claims that as well. I'm not digging up the links again, because Safari quit and lost this post.)
But when you make claims that are, well, kinda wrong with no sources, I wonder how much else of your book is unverifiable. And when you're writing for children, like this author is, you should be giving them correct information.
Still, not as bad as the book on T-Rex's that I read, that made truly bizarre claims that no one else I know of has heard of, either, so it wasn't /that/ bad, Just this one fact makes me question the others.