The Fairy Ring of the Nibble Onions is the most detailed of the four Bunnies & Burrows published adventures. It is 19 pages including a color map and has three acts, each of which can take a session to play.

The rabbit warren has been stricken with an illness and the PCs are sent to find the cure. The cure is in the farmer's garden but there is a new defense that repels rabbits. To find a way through that defense the PCs have to find Brown Hilda, a legendary heroine, who knows how to get through the defense. She in turn sends them on a quest to find the nibble onions and then the PCs use the nibble onions to get into the garden, grabs some pumpkin seeds and return to save the warren. Except there is one plot twist waiting for them...

The adventure has good detail on NPCs including a couple of traders, Brown Hilda, and a raven that hounds the PCs. There is advice for tricky parts of the adventure and a fair amount of text to read to PCs. There is a mystery to solve if the PCs are paying attention to the clues and talking to NPCs.

Overall the best B&B adventure and maybe the only one worth buying.