Bob Ostrom Books

How high would a housefly fly if a housefly would fly high? Don't worry, you don't need to answer that question. It's just one of the many tongue twisters you'll find in this book. But beware--you...

Bug jokes

By Pam Rosenberg, Bob Ostrom

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What's worse than an alligator with a toothache? A centipede with athlete's foot! Kids will go bee-serk over these fun and creative jokes about our little six- and eight-legged friends. --Publisher...

Dinosaur jokes

By Pam Rosenberg, Bob Ostrom

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How do dinosaurs pay their bills? With Tyrannosaurus checks! What should you do if a dinosaur sneezes? Why, get out of the way, of course! These are just two of the dinosaur jokes that will have yo...

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.

Bob Ostrom Books

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

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