August Derleth Books

Quest for Cthulhu

Average: 0.00, 0 Ratings

"The mythical cycle of Cthulhu is expanded and enriched in this one-volume edition of tales.". "Conjuring myth out of horror, Derleth maps perilous journeys into an arcane world from a legend-haun...

The Lurker at the Threshold

By H.P. Lovecraft, August Derleth

Average: 0.00, 0 Ratings

Writing fiction.

By August Derleth

Average: 0.00, 0 Ratings

Wisconsin earth, a Sac Prairie sampler

By August Derleth

Average: 0.00, 0 Ratings

Fire and Sleet and Candlelight

By August Derleth

Average: 0.00, 0 Ratings

Dark of the Moon

By August Derleth

Average: 0.00, 0 Ratings

Some notes on H. P. Lovecraft

By August Derleth

Average: 0.00, 0 Ratings

Three literary men

By August Derleth

Average: 0.00, 0 Ratings

Some notes on H. P. Lovecraft

By R. B. Mowat, August Derleth

Average: 0.00, 0 Ratings

The adventures of Solar Pons

By August Derleth

Average: 0.00, 0 Ratings

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.