Antoinette Portis Books

Splash! A spunky little girl plays a spirited game of hide-and-seek with water, in this gorgeously illustrated nonfiction picture book.A Robert F. Sibert Honor BookAn ALA Notable Children's BookHey...

A New Green Day

By Written Illustrated By Antoinette Portis

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If you listen, nature speaks. Explore nature through evocative riddles and bold imagery that take the reader from day to night and back again in this perfect read aloud.From the author of the Sibe...

A Seed Grows

By Written Illlustrated By Antoinette Portis

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From a tiny seed to a huge, fold-out bloom, the transformative life cycle of a sunflower plays out in this bold read-aloud. A Sibert Honor Book!A Theodor Seuss Geisel Honor Book!To understand how a...

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By Antoinette Portis

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As a boy and his mother move quickly through the city, they're drawn to different things. The boy sees a dog, a butterfly, and a hungry duck while his mother rushes them toward the departing train....

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.