Carolyn Keene Books

More than one hundred easy recipes, some with Nancy's special cooking secret. Includes "Detective Burgers," "Double Jinx Salad," "Twisted Candles Peach Crisp," and many more.

Mystery of the ivory charm

By Carolyn Keene

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Nancy Drew determines whether an ivory elephant charm really protects its wearer from harm when she investigates the involvement of a member of the Bengleton Wild-Animal Show in a mysterious scheme.

The ringmaster's secret

By Carolyn Keene

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Nancy Drew joins the circus in order to investigate the mystery surrounding a gold charm bracelet and a young orphaned aerialist.

The scarlet slipper mystery

By Carolyn Keene

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Nancy Drew comes to the aid of the owners of a local dancing school when they receive an anonymous note threatening their lives.

The strange message in the parchment

By Carolyn Keene

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While trying to recover a set of stolen parchment paintings, Nancy Drew becomes involved in tracking a kidnapper and extortionist.

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.