Suzanne Lang, Max Lang Books

Grumpy Monkey's Little Book of Grumpiness

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In this hilarious original board book for the littlest grumpy monkey, Jim learns that sometimes it's hard to get over a bad case of grumpiness, but having a good friend can help.What can make a gru...

Grumpy Monkey Are We There Yet?

By Suzanne Lang, Max Lang

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From the New York Times bestselling Grumpy Monkey series comes a sturdy board book that tackles a common toddler problem as Jim Panzee finds that waiting is never easy, but sometimes pati...

Grumpy Monkey Valentine Gross-Out

By Max Lang, Suzanne Lang, Suzanne Lang; Illustrated By Max Lang, Suzanne Lang, Max Lang

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NEW YORK TIMES BESTSELLER • The beloved character Jim Panzee is very grumpy about Valentine’s Day until his buddy Norman shows him that the holiday is for everyone. Two pages of full-color stickers...

Grumpy Monkey Party Time!

By Max Lang, Suzanne Lang, Suzanne Lang; Illustrated By Max Lang, Suzanne Lang, Max Lang

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Everyone's favorite New York Times bestselling Grumpy Monkey is back in this hilarious sequel about managing social anxiety and listening to your needs! Have you ever been a little anxious abou...

Grumpy Monkey Party Time

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Grumpy Monkey Up All Night

By Max Lang, Suzanne Lang, Suzanne Lang; Illustrated By Max Lang, Suzanne Lang, Max Lang

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Everyone's favorite New York Times bestselling Grumpy Monkey is back in this hilarious bedtime story about dealing with frustration when you don't get to do what you want! Have you ever stayed...

Grumpy Monkey up All Night

By Suzanne Lang, Max Lang

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Grumpy Monkey Up All Night

By Suzanne Lang, Max Lang

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Everyone's favorite New York Times bestselling Grumpy Monkey is back in this hilarious bedtime story about dealing with frustration when you don't get to do what you want!Have you ever stayed up wa...

Grumpy Monkey Says No!

By Suzanne Lang, Max Lang

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In this original board book that tackles a common toddler issue, the bestselling character finds out that “no!” isn’t always the best answer.Does Jim Panzee want to go for a walk?...

Grumpy Monkey Valentine Gross Out

By Suzanne Lang, Max Lang

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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.