Julie Holderman

Julie Holderman is an editor in children's and YA publishing who is best known to Tamora Pierce's readers as one of the five additional contributors, alongside Timothy Liebe and Megan Messinger among others, credited on Tortall: A Spy's Guide (2017), an in-world nonfiction companion to Pierce's Tortall novels presented as spymaster George Cooper's private files. The exact division of work between the credited contributors was not specified by the publisher, so it isn't possible to say precisely which sections are hers.

Publicly, Holderman is associated with Tamora Pierce's own website and publishing circle and has worked as an editor for Random House Children's Books and as a freelance editor since. That editorial background fits the nature of A Spy's Guide, a heavily designed, world-building reference book of the kind editorial teams typically assemble collectively rather than a single author writing straight prose.

This is her only credit in this catalogue. Readers interested in her contribution should pick up A Spy's Guide as a companion for existing Tortall fans rather than as a starting point -- it assumes familiarity with Pierce's novels and isn't a story in its own right.