The classroom rat from Malcolm at Midnight returns to race through "the twists and turns of a fast-paced roller coaster of a plot" ( Kirkus Reviews).

Now that Snip the cat is gone (but hardly forgotten), the classroom animals of the Midnight Academy are ready for things to get back to normal at the McKenna School. After all, protecting nutters (students) and lankies (teachers) is an around-the-clock job!

When a rare coin and a strange code are uncovered in the school, Malcolm and the Academy have another mystery on their paws. To find answers, Malcolm ventures into the dangerous outside world full of shady characters, new friends, and old enemies. Can Malcolm solve the mystery and save the school before it's too late? Join Malcolm and company as they take on their most challenging assignment yet.

Illustrated with black-and-white line drawings by Brian Lies, author and illustrator of the New York Times bestsellers Bats at the Beach, Bats at the Library, and Bats at the Ballgame, this engaging novel will have readers rooting for Malcolm as they try to solve the mystery alongside him.

"Twists and turns abound, including a forgotten time capsule, buried treasure, secret codes, and hidden identities... For middle grade readers who enjoy animal adventure tales." - School Library Journal

"Lies' naturalistic illustrations enhance the general air of realism in a tale featuring unusually rich thematic underpinnings and a small protagonist with both 'hero brain' and 'hero heart.'" - Booklist