Theresa Schwegel Books

Probable Cause

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Rookie police officer Ray Weiss, following in his family's law enforcement legacy, confronts a brutal hazing initiation on the part of his senior officers in Chicago's District 20 and stumbles upon...

Person of Interest

By Theresa Schwegel

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Officer Down

By Theresa Schwegel

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The Chicago Police Department says Samantha Mack shot her partner, Fred, during the confusion of a bungled pursuit. Mack says it was their quarry, a violent pedophile named Marco Trovic, who fired...

Person of Interest

By Theresa Schwegel

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Probable Cause

By Theresa Schwegel

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The lies we tell

By Theresa Schwegel

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"In THE LIES WE TELL by Theresa Schwegel, Chicago police detective Gina Simonetti is keeping a secret from the department: she has multiple sclerosis. Raising her young niece on her own, Gina hides...

The good boy

By Theresa Schwegel

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"Edgar award winner Theresa Schwegel returns with The Good Boy, her most dramatic and emotional novel to date, a family epic that combines the hard-boiled grit of her acclaimed police thrillers wit...

The good boy

By Theresa Schwegel

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Edgar award winner Theresa Schwegel returns with The Good Boy, her most dramatic and emotional novel to date, a family epic that combines the hard-boiled grit of her acclaimed police thrillers with...

The Good Boy

By Theresa Schwegel

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Last Known Address

By Theresa Schwegel

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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.