I don't expect it to have much. Really just wanted a cumulative source to thumb through to get me introduced to new fish to then go research thoroughly. Also so when I walk into a fish store I can at least roughly identify some of the things I'm looking at. I've made myself out to look like a fool on one or more occasion by staring at something obvious that I had just never come across. It's more of an idea generator than an exhaustive source on a spp.
THAT, it may serve you. I just remember the "mini" version of Axelrod's fish Atlases and they were as thick as the regular versions only with smaller pictures. I've found few Mini versions of books to be all that helpful as for proper, or should I say complete, information.