Picture books and graphic novel sequels releasing this month include a group of crime-fighting pigeons, the fourth graphic novel in a popular middle-grade series, a team of mythological critters trying to save their pet store, and more.

A World of Opposites

by Gray Malin (Abrams, $17.99, May 5, $17.99, ISBN 978-1-4197-3970-5)

Malin explores the concept of opposites through photographs taken from Antarctica to Africa, taking readers on a journey through the barren desert landscape of Namibia to the waves of the Australian ocean.

Becoming Brianna

by Terri Libenson (HarperCollins/Balzer + Bray, $15.99, May 5, ISBN 978-0-06-289454-0)

The fourth book in the Emmie & Friends series of graphic- novel hybrids features middle-schooler Bri of Positively Izzy preparing for her bat mitzvah while juggling drama at school and at home.

Real Pigeons Eat Danger

by Andrew McDonald, illus. by Ben Wood (Random House, May 5, $13.99, ISBN 978-0-593-11946-4)

The adventures of the Real Pigeons, a squad of crime-fighting feathered friends, continue in this second installment as they infiltrate a secret warehouse full of bottled birds and take down a criminal ostrich.

Llama Unleashes the Alpacalypse

by Jonathan Stutzman and Heather Fox (Holt, May 5, $18.99 ISBN 978-1-250-22285-5)

The hapless Llama returns in the follow-up to Llama Destroys the World (see our q&a with the creators here). Llama has made a mess of his home and decides to clone his friend, Alpaca, to pick up after himself. But how many is too many? Can Llama save the world, again, after destroying the world… again?

Zeus The Mighty: The Maze of the Menacing Minotaur

by Crispin Boyer (Under the Stars, May 19, $12.99, ISBN 978-1-4263-3756-7)

The critters are back in the second book of Zeus the Mighty series. This time, they must solve the mystery of the labyrinth (the pet center’s duct system) to thwart the threat to the Mount Olympus pet supply and rescue center.