The creative folks working at children’s publishing houses orchestrate pretty elaborate costumed office parties year after year, and they did not fail to disappoint this Halloween. See some of your favorite characters and books literally and literarily personified below.

Candlewick designers Lisa Rudden and Matt Roeser spice it up as Girl and Guy Fieri.

(From l.) Andie Krawczyk, Allison Cole, and Katie Cunningham say "Batter up!" as members of the Rockford Peaches from A League of Their Own.

Not one, but two Princesses in Black! Melanie Cordova (l.) and Jamie Tan are ready to do battle with any Halloween monsters that threaten Candlewick.

At Chronicle’s offices, each floor took on the theme of one of the company’s books. The third floor this year was The Egyptian Book of the Dead; here, design director Kristin Hewitt leads groups into the depths.

Dispensary doctors (from l.): Will Schrom, Erynn Im-Sato, and Lara Starr.

DK special markets manager Jay Franco as Peter Parker locked up in Arkham Asylum.

The DK staff boards the elevator to check out the competition at other Penguin Random House departments. Clockwise from l.: Jessica Lee, Jennifer Stephen, Jennifer Bastien, Mindy Fichter, Jennifer Chung, Malisa Savanh, Ana Giovinazzo, Kimberly DeDecker, and Olivia Peluso.

Egmont USA’s Halloween party featured fun headgear: (from l.) Cassandar Baim, Alison Weiss, Andrea Cascardi, Michelle Bayuk, Tara Slagle, and Jordan Hamessley.

HarperCollins’s children’s publicity team represented the forthcoming picture book, What This Story Needs Is a Pig in a Wig.

Preeti Chhibber came as the picture book My Bus.

Part of the HarperCollins integrated marketing team dressed as the characters from Danielle Paige’s Dorothy Must Die.

The digital marketing team dressed up as the peddler and the monkeys from Caps for Sale.

Houghton Mifflin Harcourt’s Halloween party spread.

(From l.) HMH staffers Rita DeAngelis as a princess, Laura Doyle as Cersei Lannister from Game of Thrones, and Taylor Foley as “Sassy Siri.”

That’s Little, Brown Books for Young Readers staffers (from l.) Allegra Green, Jane Lee and Emilie Polster as Jennifer E. Smith book covers: The Geography of You and Me, This Is What Happy Looks Like, and The Statistical Probability of Love at First Sight.

Lukas Fauset and Lisa Moraleda as Eggs from The Boxtrolls.

Bethany Strout as Space Taxi.

The Little, Brown group in all their costumed glory.

The Penguin Young Readers Group sales team dressed up as The Book with No Pictures.

Scholastic held a Halloween costume contest judged by R.L. Stine. Here he is with Goosebumps editor Matt Ringler dressed as… R.L. Stine.

An assemblage of Scholastic staffers as Harry Potter characters, including twin brothers Jeremy and Jeffrey West, who dressed as the Weasley twins.

Lori Benton and Jennifer Ung as the Chicken House imprint logo.

The publicity team as Ice Cream Summer.

Team Klutz stayed true to its mission, and came as nail art.

The content delivery department at Sourcebooks orchestrated an impressive group costume: here they are as author Anne Geddes and her babies.

Sourcebooks’ publicity department took the costume contest honors for their Wizard of Oz.

S&S associate art director Lucy Cummins dressed as the jacket for the YA novel 100 Sideways Miles.

Jon Anderson and Richard Ackoon as One Big Pair of Underwear.

The children's publicity department as Sick Simon.

The publisher and author relations team of nonprofit First Book choose one book they love as the theme for their annual costume competition; this year they chose the Nathan Hale’s Hazardous Tales series. Here they are as characters or whole books (back row from l.): Lori Prince, Jason Ambrose, Matthew White, Miriam Keil, Alison Morris, Kate Childs, Jennifer Mosko, and Erica Perl; (front row) Kenna Sloan and Olivia Green.