Entering Grade Four
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MYSTERY

Bunnicula and Friends series by James Howe
Book 1: Bunnicula: A Rabbit Tale of Mystery by Debra Howe and James Howe
Harold the dog becomes very worried when the humans bring home a pet rabbit they found at a showing of the movie Dracula. The bunny's strange red eyes and suspiciously sharp fangs are bad enough, but then all the vegetables from the fridge are found drained of color.
Charlie & Frog series by Karen Kane
Book 1: Charlie & Frog: A Mystery
An old woman gives Charlie a message in sign language, and then disappears. Charlie must enlist a new friend to decipher the message and find out what the woman wanted and where she could have gone.
​Chester Keene Cracks the Code by Kekla Magoon
Chester's life is very predictable and he likes it that way. His friend Skye is a lot more flexible and spontaneous, which sometimes makes him nervous. But they need to work together, using both friends' strengths, to solve a complex puzzle involving a heist.
J.J. Tully Mystery series by Doreen Cronin
Book 1: The Trouble With Chickens
J.J. is a retired search and rescue dog, who would really rather not deal with chickens. However, when a chicken comes to him with a tale of missing chicks being held for ransom, he reluctantly takes the case.
Magnolia Wu Unfolds It All by Chanel Miller
Magnolia Wu is the world's only sock detective, as far as she knows. While working in her parents' laundromat, she carefully pins lost socks to the bulletin board, but no one seems to notice the socks or Magnolia. But this summer, she and a new found friend set off across the New York City to solve the mystery of each missing sock, asking questions in subways and delis and plant stores and pizzerias, meeting people and uncovering the unimaginable. 
Max Finder Mystery Collected Casebooks series by Liam O'Donnell
Max, a fan of Sherlock Holmes, and his friends use their skills to investigate mysteries in their hometown of Whispering Meadows. Each volume contains ten mysteries, with solutions at the end. (graphic novel)
Midnight at the Barclay Hotel by Fleur Bradley
JJ convinces his mom to accept a free weekend getaway at The Barclay Hotel, because he's heard it's haunted. But when the owner dies, and his mother is accused of the murder, he and his friends have to solve the mystery before it's too late.
Muddy Max: The Mystery of Marsh Creek by Elizabeth Rusch
Max can't figure out why his parents are such clean freaks. Then he discovers that being covered in mud gives him superpowers. What then is the connection between Marsh Creek and his family? Max and his friends vow to find out. (graphic novel)
Poptropica series 
Book 1: Mystery of the Map by Jack Chabert
When friends Oliver, Mya and Jorge go on a hot air balloon ride, they do not expect that the captain will strand them on an uncharted island full of extinct animals and VIkings. (graphic novel)
Ra the Mighty series by A.B. Greenfield
Book 1: Ra the Mighty: Cat Detective
Pharoah's cat Ra likes the easy life, but his friend Khepri the scarab beetle convinces him he needs to investigate a missing amulet and save a servant girl framed for the crime.
Secret Agent Jack Stalwart series by Elizabeth Singer Hunt
Book 1: The Escape of the Deadly Dinosaur
Someone has stolen an allosaurus toe from the Natural History Museum in New York CIty, and is using it in a genetic experiment. Now Jack must stop a rampaging creature that is terrorizing the city.
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