Cathy Hapka Books

Curious George s Dinosaur Discovery

By Anna Grossnickle Hines, Cathy Hapka

Average: 0.00, 0 Ratings

Curious George and the man in the yellow hat help some scientists dig for dinosaur bones.

Curious George s Dinosaur Discovery Book and CD

By H.A. And Margret Rey, Cathy Hapka

Average: 0.00, 0 Ratings

Merry Christmas, Curious George

By H. A. Rey, Cathy Hapka, Catherine Hapka

Average: 0.00, 0 Ratings

Separated from the man in the yellow hat while at a Christmas tree farm, Curious George ends up at a hospital where he delights the child patients with his own brand of tree trimming.

Supernova (Star Power)

By Cathy Hapka

Average: 0.00, 0 Ratings

Fourteen-year-old Star Calloway is the most famous pop star in the world. The only thing which makes her unhappy is that her parents and brother are missing.

Blast from the past

By Cathy Hapka

Average: 0.00, 0 Ratings

While on tour in Switzerland, Star meets a girl named Samantha. Sam explains that she and Star went to kindergarten together before Sam's family moved away to Europe.

Someday, some way

By Cathy Hapka

Average: 0.00, 0 Ratings

How can Star choose? Star has been keeping so busy on her European tour that she hasn't had much time to get homesick. But when she flies home for her grandmother's birthday, she realizes all that...

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.