Betsy Hoffman Books

Here a ghost, there a ghost

By Betsy Hoffman

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Discusses the many encounters people have had with ghosts and the activities of professional ghost watchers.

Haunted places

By Betsy Hoffman

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Includes accounts of ghosts believed by some to haunt the White House, Carpenters' Hall in Philadelphia, and other houses and buildings across the United States.

Visions of the future

By Betsy Hoffman, Elizabeth Hoffman

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Discusses palmistry, a method of predicting the future by interpreting the lines on the palm and fingers.

This House Is Haunted!

By Betsy Hoffman, Elizabeth Hoffman

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The author describes the house she and her family moved into, only to discover it was haunted.

Engine Performance 4 Package

By Chek Chart Staff, Betsy Hoffman, Hoffman Joan

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Engine Performance: Shop Manual

By Betsy Hoffman

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Engine Performance: Package Shop Manual Pt. 4

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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.