Katherine Ayres Books

Family tree

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While trying to construct her family tree for a school assignment, eleven-year-old Tyler discovers her Amish heritage and other secrets about her family's past.

North by night

By Katherine Ayres

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Presents the journal of a sixteen-year-old girl whose family operates a stop on the Underground Railroad.

Silver dollar girl

By Katherine Ayres

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In 1885, unhappy living with her aunt and uncle in Pittsburgh, Valentine Harper disguises herself as a boy and runs away to Colorado determined to find her father who has gone there in search of gold.

Stealing South: A Story of the Underground Railroad

By Katherine Ayres

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Macaroni Boy

By Katherine Ayres

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In Pittsburgh in 1933, sixth-grader Mike Costa notices a connection between several strange occurrences, but the only way he can find out the truth about what's happening is to be nice to the class...

Macaroni boy

By Katherine Ayres

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Houghton Mifflin Mathematics

By Houghton Mifflin Company

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North by Night

By Katherine Ayres

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It's 1851 and Lucy Spencer's family is keeping a secret. Their Ohio home is a station on the Underground Railroad, the network of people and places that helps fugitive slaves escape to freedom in C...

Family Tree Yearling

By Katherine Ayres

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Silver dollar girl

By Katherine Ayres

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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.