I wouldn't say I'm an expert on Cryptids, but this wasn't my first rodeo. I only made it to page 39 before I was disgusted. This does not read as a Field Guide, more like "Deena Wast Budd's Musings on Cryptids and Other Beasts." Each entry is a cursory look at what the author thinks of each creature, no depth of history, modus operandi, characteristics, etc.
The Skyfish entry doesn't seem to belong in the book, and she doesn't attempt to argue that it does. The section on The Kentucky Goblins is completely mislabeled. They sound nothing like what I understand Goblins to be and she doesn't explain what Goblins are, how they act, etc., so that I might accept them as such. They seem more like Aliens, but she doesn't address that either.
On top of that, there doesn't seem to be any organization among the entries either. I've written more in-depth and cohesive material when I was an inexperienced undergraduate student. I get the feeling that this is a collection of small jokes that Budd is playing on the field of Cryptozoology.
Although childish in presentation, I would easily recommend "The Book of Dragons & Other Mythical Beasts" by Joseph Nigg over this rubbish. For future reference, "A Field Guild to Demons, Fairies, Fallen Angels, and Other Subversive Spirits" by Carol K. Mack and Dinah Mack is a better indication of how a Field Guild ought to read.