From the back cover:
Goodman Games presents Original Adventures Reincarnated #8, Grimtooth’s Old School Traps. This tome contains 150 classic traps, fully developed for 5E rules for the first time ever. It could not be any easier to get these death traps to your game table. Inside you will find delver dicers, character crushers, dventurer anxieties, minion munchers, hero haranguers, and much more to protect your dungeon treasures. All crafted by Grimtooth, the Trap Master troll, himself.
Grimtooth’s Old School Traps is an homage to the classic books Grimtooth’s Traps and Traps Too. Just like other books in the Original Adventures Reincarnated series, you will find essays from industry luminaries, recounting the impacts of these traps (on both characters, and the game industry) over the decades.
The next time your delvers open a dungeon door, spring one of these traps on them!