Entering Grade Four
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HUMOR
The Bad Guys series by Aaron Blabey
Mr. Wolf, Mr. Piranha, Mr. Snake, and Mr. Shark are about to start a campaign to become good guys. Mr. Wolf has a daring plan for their first good guy mission: breaking two hundred dogs out of the Maximum Security City Dog Pound. Will Operation Dog Pound go smoothly? Will the Bad Guys become the Good Guys? And will Mr. Snake please stop swallowing Mr. Piranha?! (graphic novel)
Big Monty series by Matt Maxx
Book 1: Big Monty and the Lunatic Lunch Lady
Fifth-grader Merlin Montgomery, AKA Big Monty, needs to use all his science skills to defeat the monster made of leftover lasagna and fish sticks that the lunch lady has created to attack the ungrateful students.
The Cookie Chronicles series
Ben Yokoyama and the Cookie of Doom by Matthew Swanson
Ben takes his fortune cookie fortune, "Live each day as though it is your last" literally and decides he needs to write a bucket list and fill it before it's too late.
Garlic and Vampire by Bree Paulsen
Garlic feels as though she's always doing something wrong, but feels safe in the garden with her friends. When a vampire moves in nearby, her friends nominate Garlic as the obvious one to take care of this new threat. Can Garlic rise to the occasion? (graphic novel)
House of Robots series by James Patterson
Book 1: House of Robots
Sammy Hayes-Rodriguez struggles to fit in to his new fifth-grade class, which becomes difficult when his inventor mother requires him to take her latest creation, a robotic "brother," to school with him to learn to become a student.
Katie the Catsitter series
Book 1: Katie the Catsitter
Katie wants to earn some money, so she gets a job taking care of the neighbor's cats--all 217 of them! Also, why is the owner always out when the city's most notorious criminal is committing crimes? (graphic novel)
Monster Friends by Kaeti Vandorn
Reggie is looking forward to a peaceful summer housesitting for his cousins. Friendly neighbor Emily is very enthusiastic and plans various adventures for them involving tigers, owls, and sea serpents. (graphic novel)
Platypus Police Squad series by Jarrett J. Krosoczka
Book 1: The Frog Who Croaked
Paired together after a veteran detective retires, platypus police squad members Rick Zengo, a hotshot rookie, and Corey O'Malley, a hard-nosed old-timer, struggle with their differences while tackling their first case involving a missing schoolteacher and a duffle bag filled with illegal fish.
Sparks series by Ian Boothby
Book 1: Sparks
August and Charlie want to help save the universe, but as cats, no one trusts them. So, disguised in a mechanical dog suit, they set out to foil the evil alien Princess. (graphic novel)
Timmy Failure series by Stephan Pastis
Book 1: Mistakes Were Made
Eleven-year-old Timmy Failure launches a detective business with a lazy polar bear partner named Total but finds their enterprise, "Total Failure, Inc." challenged by a college-bound spy and a four-foot-tall girl whom Timmy refuses to acknowledge.
The Treehouse Books series by Andy Griffiths
Book 1: The 13-Story Treehouse: Monkey Mayhem!
Kid authors Andy and Terry live in a very large treehouse complete with a bowling alley, a see-through swimming pool, and a secret underground laboratory, They are working on their next book, but distractions including thirteen flying cats, giant bananas, mermaids, and sea monsters pretending to be mermaids keep getting in their way.
Wedgie & Gizmo series by
Book 1: Wedgie & Gizmo
Wedgie is a happy, eager-to-please Corgi dog.  Gizmo is a sullen, evil genius guinea pig. When their humans move into the same house, Gizmo begins to plot to: a) get out of the pink Barbie house, b) take over the world and c) destroy his archenemy Wedgie.