Be afraid of your pencil. Be VERY afraid! Just when Bob is getting over their last battle with the grossly evil pizza alien, he and Hot Dog have a new enemy to crafty little pencil snatchers from the planet Pencilvania. Beginning readers will be clamoring for Hot Dog and Bob's second adventure.
No teacher is replaced by an alien lookalike in this entry, but at least the teacher is out of the room when the craziness goes down. Very silly, easy read, and I love that Bob's best friend is a girl (Clementine). You don't get too many books at this level where boys admit it's okay to be friends with a girl.
No wonder my kids love these books! Perfect humor for intermediate level kiddos. Short chapters with several pictures in between. Easy for kids to read in a couple of days.