Robert J. Harris Books

Leonardo and the Death Machine

By Robert J. Harris

Average: 0.00, 0 Ratings

Odysseus in the Serpent Maze

By Jane Yolen

Average: 0.00, 0 Ratings

Thirteen-year-old Odysseus, who longs to be a hero, has many opportunities to prove himself during an adventure which involves pirates and satyrs, a trip to Crete's Labyrinth, and the two young gir...

Hippolyta and the Curse of the Amazons

By Jane Yolen

Average: 0.00, 0 Ratings

Thirteen-year-old Hippolyta, a princess of the Amazons, fights to save her people from destruction when her mother the Queen refuses to sacrifice her second-born male child.

Hippolyta and the Curse of the Amazons

Average: 0.00, 0 Ratings

Jason and the Gorgon's Blood

By Jane Yolen

Average: 0.00, 0 Ratings

Jason, who will grow up to become the head of the Argonauts, leads five other boys on a dangerous quest to save the kingdom of Iolcus, learning along the way what it means to be in command.

Jason and the Gorgon's Blood

Average: 0.00, 0 Ratings

Atalanta and the Arcadian Beast

Average: 0.00, 0 Ratings

Hippolyta and the Curse of the Amazons

By Jane Yolen

Average: 0.00, 0 Ratings

Thirteen-year-old Hippolyta, a princess of the Amazons, fights to save her people from destruction when her mother the Queen refuses to sacrifice her second-born male child.

Atalanta and the Arcadian Beast

By Jane Yolen

Average: 0.00, 0 Ratings

Twelve-year-old Atalanta discovers a home and friendship with a bear, misunderstanding from town-dwellers, and grudging respect from the great hunter Orion, as together they pursue mysterious creat...

Queen s Own Fool

By Robert J. Harris, Jane Yolen

Average: 0.00, 0 Ratings

How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

If you’re in the world of books—whether as a publisher, librarian, bookseller, or avid collector—you’ve likely come across the terms ISBN-10 and ISBN-13. Understanding these formats and knowing how to convert between them is essential for maintaining consistency and compatibility in book records. In this post, we’ll cover everything you need to know about ISBN conversions, step by step.

What is an EAN and How Does it Relate to an ISBN?

If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.