Henry Winkler Books

The Secret Life of a Ping Pong Wizard

By Henry Winkler

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Summer School! What Genius Thought That Up?

By Henry Winkler

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Help! Somebody Get Me Out of Fourth Grade

By Henry Winkler

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The Secret Life of a Ping-Pong Wizard

By Henry Winkler

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Summer School! What Genius Thought That Up? 8

By Henry Winkler, Lin Oliver

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Summer school are two words in the English language that Hank Zipzer doesn't want to learn. But there's no getting out of this one for Hank-summer school, here he comes! Will Hank have to spend the...

Help! Somebody Get Me Out of Fourth Grade 7

By Henry Winkler, Lin Oliver

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It’s time for the end of year parent-teacher conference, and Hank’s in a panic. He’s afraid that his teacher is going to tell his parents that he has to repeat the fourth grade. S...

I Got a D in Salami 2

By Henry Winkler, Lin Oliver

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It's report card day-the most dreaded day in Hank's school year. And when Hank gets his grades, they're his worst nightmare come true: a D in spelling, a D in reading, a D in math. After school, Ha...

My Dog's a Scaredy-Cat 10

By Henry Winkler, Lin Oliver

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On Halloween day, Hank comes to school dressed in what he thinks is the perfect costume-a table in an Italian restaurant. Nick McKelty, the resident school bully (dressed in a total blood and guts...

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.