Harper Paris Books

The mystery of the gold coin

Average: 0.00, 0 Ratings

Second graders Ethan and Ella are sad about moving away from their hometown to travel the world with their mom, a journalist, and dad, who will home school them, but before they go they have a myst...

The mystery of the gold coin

By Harper Paris

Average: 0.00, 0 Ratings

The mystery of the mosaic

By Harper Paris

Average: 0.00, 0 Ratings

In Venice, Italy, second graders Ethan and Ella hope to find a stolen gondola and a hidden mosaic before their parents realize they are missing.

The mystery of the mosaic

By Harper Paris

Average: 0.00, 0 Ratings

In Venice, Italy, second graders Ethan and Ella hope to find a stolen gondola and a hidden mosaic before their parents realize they are missing.

The mystery of the secret society

By Harper Paris

Average: 0.00, 0 Ratings

"Twins Ethan and Ella go on an adventure in Greece, where they learn about the mystery-solving Society of Apollo"--

The mystery of the secret society

By Harper Paris

Average: 0.00, 0 Ratings

"Twins Ethan and Ella go on an adventure in Greece, where they learn about the mystery-solving Society of Apollo"--

The mystery of the suspicious spices

By Harper Paris

Average: 0.00, 0 Ratings

In a Mumbai market, twin detectives Ethan and Ella investigate why a spice seller's spices have suddenly gone bad.

The mystery of the suspicious spices

By Harper Paris

Average: 0.00, 0 Ratings

In a Mumbai market, twin detectives Ethan and Ella investigate why a spice seller's spices have suddenly gone bad.

Greetings from Somewhere 4 Books in 1

By Marcos Calo, Harper Paris

Average: 0.00, 0 Ratings

The mystery across the secret bridge

By Harper Paris

Average: 0.00, 0 Ratings

While in Machu Picchu, Peru, with their parents, eight-year-old twins Ethan and Ella cross a secret bridge and discover a mysterious stone sculpture.

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.