Allen Ascher Books

Summit 2: English for Today's World
Summit 2 Workbook
Top Notch 1 with Take-Home Super CD-ROM
Top Notch 2
Top Notch 2

By Joan M. Saslow, Allen Ascher

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Top Notch 1
Top Notch 1

By Joan M. Saslow, Allen Ascher

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Top Notch Fundamentals Student Book wAudio CD
Top Notch TV Fundamentals Activity Worksheets and Teaching Notes
Top Notch: Fundamentals
Top Notch TV 2 Video Course
Top Notch TV 2 Video Course

By Joan M. Saslow, Allen Ascher

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"Top Notch TV is a four-level video program that accompanies the full Top Notch English course. Each of the levels of Top Notch TV contains ten episodes of a hilarious TV-style sitcom (with a TV-s...

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Top Notch TV 3 Video Course

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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.

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