David A. Adler Books

A picture book of Abraham Lincoln

By David A. Adler

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A picture book of George Washington

By David A. Adler

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Hanukkah fun book

By David A. Adler

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A collection of puzzles, word games, riddles, magic tricks, and number games with Hanukkah themes.

Passover fun book

By David A. Adler

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A collection of puzzles, word games, riddles, magic tricks, and number games with Passover themes.

The Bible fun book

By David A. Adler

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A collection of puzzles, word games, riddles, magic tricks, and number games with Old Testament themes.

The children of Chelm

By David A. Adler

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Three stories from Polish town of Chelm where the "wise" council members, though doing their best, make foolish decisions regarding the townspeople.

The house on the roof

By David A. Adler

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Despite the protests of his landlady, an old man builds a Sukkah for himself and his grandchildren on the roof of an apartment building.

World of weather

By David A. Adler

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Questions and answers provide basic information about weather, including the formation of winds, snow, and thunderstorms.

World of weather

By David A. Adler

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Questions and answers provide basic information about weather, including the formation of winds, snow, and thunderstorms.

Our amazing ocean

By David A. Adler

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Questions and answers provide basic information about the ocean, including wave formation, currents, depth, salinity, marine biology, and its utilization for humankind.

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.