Lee Shawn Letterer Books

Teenage Mutant Ninja Turtles

By Mateus Santolouco, Bobby Curnow, Chris Mowry, Tom Waltz, Robbie Robbins, Dan Duncan, Lee Shawn Letterer, Kevin B. Eastman, Ronda Pattison

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Teenage Mutant Ninja Turtles Amazing Adventures: Tea-Time for a Turtle

By Ian Flynn Peter DiCicco Fabian Rangel Caleb Goellner Chad Thomas Coleman Engle Billy Martin Dave Alvarez Jon Sommariva

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All-ages action building on the hit Nickelodeon cartoon series! Follow all of the Turtles’ adventures in the stories "Tea-Time For a Turtle," featuring Tiger Claw and Baxter Stockman, "The To...

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.