From publisher blurb:
Welcome to North America's Weird Mythology!
"Fearsome critters" is a phrase for a uniquely American phenomenon. It first starts with American lumberjacks who were fond of inventing stories to pass the time. Sometimes those stories were invented to prank the newbies (known as “tenderfoots”), sometimes they were to explain unknown phenomena, and sometimes it’s clear they were created to just to be amusing. Often forgotten by fantasy bestiaries, these beasts are back to remind you that they're no pushovers.
Inside, you'll find 47 new monsters for 5E games, ranging from the ball-tailed dingmaul to the soul-sucking dungavenhooter, from the fast-moving flitterick to the backwards-flying goofus bird, from the pathetic squonk to the elusive snipe...they're all here, waiting to confound, confuse, and potentially consume adventurers.
This PDF has a bookmarked table of contents, with monsters linked by creature type, challenge rating, and environment. Challenge ratings range from 1/8 to 14.