Unjust Deserts is the eleventh book in the Nintendo Adventure Books series.
 Plot Synopsis
The Story from the Back Cover:
Yoshi's Birthday Bash
It's Yoshi's birthday party and Mario, Luigi, and all his dinosaur buddies are there to help him celebrate. All is well until Yoshi slurps down his birthday surprise and suddenly starts gobbling up everything-and everyone-in sight! Can the Mario Bros. control the dinosaur's runaway appetite and rescue his disgruntled lunch?
As in all Nintendo Adventure Books, you control the action. Only you can make the choices that allow Mario and Luigi to overcome the perils they face as they search for the cure to Yoshi's upset stomach. Help them crack codes, solve puzzles, conquer mazes, and subdue enemies. You and the Mario Bros. must outwit a whole new collection Koopa creeps-or go down in final defeat.
A Feather is shown in the inventory section but none can be found in the book.
- Buttermilk Falls (mentioned)
- Luigi's Body
- Mushroom Palace
- Mushroom Kingdom
- Palace Garden
- Plungers Lodge (mentioned)
- Royal Post Office (mentioned)
- Yoshi's Body
 Score Chart
- 1201 or more pts. — Perfect Plumber
- 801-1200 pts. — Dinosaur Explorer
- 501-800 pts. — Stomach Surveyor
- 201-500 pts. — Plunger Pupil
- 200 or less pts. — Leaky Gasket