Sheila Daar Books

Common-sense pest control

By William Olkowski

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The gardener's guide to common-sense pest control

By William Olkowski

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IPM for Schools

By Helga Olkowski, Tanya Drlik, Sheila Daar, William Olkowski

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The gardener s guide to common sense pest control

By William Olkowski

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In this revision of the 1995 original, the authors provide updated information on the control of all pests (insects and diseases) that can afflict lawns, food and ornamental gardens, and shade tree...

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.