While I don’t know anything about Laura Main (listed as the author on the cover), I do know a little about the book’s co-author, Sean Foley. Sean is one of the administrators of the Cichlid Keepers Facebook group, a huge group with nearly 40,000 members. I’m a member of that group, and Sean is an active administrator.
I haven’t read the book, so I can’t speak to the contents or the quality. It’s free with a Kindle Unlimited subscription but the paperback version will set you back more than $50 (at present). You can find it here at Amazon, where you can also get a sneak peek of the contents.