By Martha Freeman Books

Who Stole Halloween?

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Halloween the cat is missing, stolen right from her bed in the middle of the night. Then one by one other neighborhood cats disappear. Is the Harvey house ghost to blame? Will he strike again? It's...

The Case of the Piggy Bank Thief

By By Martha Freeman

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Tessa Parks, daughter of the president, has the best hiding place ever for her piggy bank. So when it disappears, she figures somebody must have stolen it. Is there really a thief loose in the Whit...

The Case of the Missing Dinosaur Egg

By By Martha Freeman

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A week before the annual Easter Egg Roll on the White House lawn, First Kids Cammie and Tessa, daughters of the first female president, and their cousin Nate attend the opening of a new dinosaur ex...

The Case of the Rock 'N' Roll Dog

By By Martha Freeman

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Most days Cammie is tired of being the daughter of the first female president of the United States and just wants her real life back. She's feeling the stress of having to be on display so often. P...

The Case of the Diamond Dog Collar

By By Martha Freeman

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No one would actually send real diamonds to a dog, would they? Now that one of the gems is missing, first kids Cammie and Tessa Parks are no longer so sure that the big, fat diamonds on Hooligan's...

The Case of the Bug on the Run

By By Martha Freeman

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First Kid Tessa loves pets, so when she finds out that a hissing cockroach at the National Zoo might meet a terrible fate, how can she resist adopting it? The rest of her family are not so thrilled...

The Case of the Ruby Slippers

By By Martha Freeman

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Aunt Jen, the official White House hostess, is being thrown a surprise party with a Wizard of Oz theme. A dog that looks just like Toto will be there -- and so will the famous ruby slippers that Ju...

Strudel's Forever Home

By By Martha Freeman

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Strudel, a homeless dachshund, loves listening to Jake read from Chief, Dog of the Old West at the animal shelter. When Jake decides to adopt him, Strudel vows to be as brave and loyal as Chief. On...

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.