Marilyn Singer Books

Leroy Is Missing

By Marilyn Singer

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Not on the trail of the missing Leroy O'Toole, detectives Sam and Dave Bean stumble onto an illegal operation.

The Case of the Fixed Election

By Marilyn Singer

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Twin detectives Dave and Sam Bean are up to their necks in trouble when they find themselves enmeshed in the dirtiest election their school has ever seen.

The Hoax on You

By Marilyn Singer

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When Sam and Dave Bean, amateur detectives, try to find the person who's been stealing jewelry around the neighborhood, their suspicions center on a foreign exchange student in their class at school.

On the Same Day in March: A Tour of the World's Weather

By Marilyn Singer

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On the Same Day in March: A Tour of the World's Weather

By Marilyn Singer

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I Believe in Water: Twelve Brushes with Religion

By Marilyn Singer

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An anthology of stories for teenagers exploring the topics of religion, belief, and spirituality by award-winning authors, including M.E. Kerr, Kyoko Mori, and Virginia Euwer Wolff.

I Believe in Water

By Marilyn Singer

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The Case of the Sabotaged School Play BookFestival

By Marilyn Singer

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The Case of the Cackling Car

By Judy Glasser, Marilyn Singer

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A Clue in Code

By Marilyn Singer

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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.