When a sinister substitute teacher takes over their class, it is up to Eugene and the rest of the Sunnyview Superhero Squad to find Ms. Beasley and foil the sub's plot.

A.J. and his friends get a Personal Digital Assistant named Miss Porter as a substitute teacher, who can order pizza and tell endless jokes, but grows power-hungry when her system is changed and tries to take over Ella Mentary School.

In a series of letters a student laments the absence of her teacher and daily routine, but she soon realizes there are benefits to mixing things up, and that perhaps having a substitue teacher is not so bad afterall.

In 2014, after a brief orientation course and a few fingerprinting sessions, Nicholson Baker became an on-call substitute teacher in a Maine public school district. Nearly every morning, he awoke to the dispatcher's five-forty a.m. phone call and headed to a nearby school. When he got there, he did his best to follow lesson plans and help his students get something done. In Baker's hands, the inner life of the classroom is examined anew -- mundane...

It's almost Halloween, but the scariest thing in Room 26 has nothing to do with creepy decorations or spooky noises: Mrs. Brisbane is missing! This might be the biggest mystery Humphrey has ever tried to solve.