Hitting bookshelves next week are a picture book about imaginary friendships, a posthumous novel from an award-winning author, a new YA heist series set in a familiar world, and more.

Six of Crows by Leigh Bardugo. Holt, $18.99; ISBN 978-1-62779-212-7. The author expands on the world of her Grisha trilogy (Shadow and Bone) with this heist novel that launches a new series. PW gave the book a starred review.

Imaginary Fred by Eoin Colfer, illus. by Oliver Jeffers. HarperCollins, $18.99; ISBN 978-0-06-237955-9. The bestselling authors team up for a picture book about two kids with imaginary friends who strike up a less-than-imaginary friendship. The book earned a starred review from PW.

Untwine by Edwidge Danticat. Scholastic Press, $16.99; ISBN 978-0-545-42303-8. The acclaimed author returns to YA with this novel about a girl who loses her twin sister and parents in an instant, and must deal with the fallout from the accident. PW gave the book a starred review.

The Doldrums by Nicholas Gannon. Greenwillow, $17.99; ISBN 978-0-06-232094-0. A new middle-grade series from a debut author features vibrant full-color illustrations, and the madcap adventures of three unlikely friends: Adélaïde, who may or may not have had her leg eaten by an alligator abroad, fretful Oliver, and Archer, who longs to rescue his grandparents, explorers trapped in the Arctic. The book earned a starred review from PW.

Hansel & Gretel by Holly Hobbie. Little, Brown, $17; ISBN 978-0-316-07017-1. The illustrator’s take on Grimm’s classic fairy tale revisits the original text of the story alongside dark, masterful images. PW gave the book a starred review.

Seriously, You Have to Eat by Adam Mansbach, illus. by Owen Brozman. Akashic, $15.95 (32p) ISBN 978-1-61775-408-1. Capitalizing on the success of his first picture book parody, Go the F**k to Sleep, Mansbach provides a cleaned-up version of its sequel, You Have to F**king Eat, a snarky takedown of juvenile eating habits (or the lack thereof).

Zen Socks by Jon J Muth. Scholastic Press, $17.99; ISBN 978-0-545-16669-0. Muth continues his picture book series begun with Zen Shorts. The book earned a starred review from PW.

Juba! by Walter Dean Myers. HarperCollins/Amistad, $17.99; ISBN 978-0-06-211271-2. Myers’s final novel, published posthumously, is based on the life of Master Juba, born William Henry Lane, and tells the unusual story of a free black man in the 19th century with a gift and passion for dance.

The Rest of Us Just Live Here by Patrick Ness. HarperTeen, $17.99; ISBN 978-0-06-240316-2. The author of the Chaos Walking series satirizes tropes of contemporary YA.

Newt’s Emerald by Garth Nix. HarperCollins/Tegen, $18.99; ISBN 978-0-06-236004-5. The bestselling author of the Old Kingdom series tries his hand at a Regency romance, in which a girl acquires an heirloom imbued with magic and meets a mysterious soldier.

All American Boys by Jason Reynolds and Brendan Kiely. Atheneum, $17.99; ISBN 978-1-4814-6333-1. In this timely novel, two authors tell the story of an act of police brutality from the perspective of two friends, one black and one white. PW gave the book a starred review.

The Lost Girl: A Fear Street Novel by R.L. Stine. St. Martin’s Griffin, $17.99; ISBN 978-1-250-05163-9. Stine returns to the world of his popular horror series from the ’90s.

Zeroes by Scott Westerfeld, Margo Lanagan, and Deborah Biancotti. Simon Pulse, $19.99; ISBN 978-1-4814-4336-4. Three popular YA authors launch a new series about a group of teenagers with superpowers who get embroiled in the seedy underworld of their town.

See PW’s full On-Sale calendar for more children’s and YA titles on sale throughout the months of September and October.