Jen Frederick Books

Last Hit

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From two bestselling authors—the first in a deliciously bold new series that takes readers to the most dangerous edge of desire . . .Nikolai: I have been a contract killer since I was a boy....

Last Breath

By Jessica Clare Jen Frederick

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From the bestselling authors of Last Hit comes the next in the steamy series that explores the exquisite power of our darkest passions . . .Regan: I never really knew what misery was until the day...

Last Kiss

By Jessica Clare Jen Frederick

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From the bestselling authors of Last Hit and Last Breath comes the next dark and sensual tale in the Hitman series that crosses the line between danger and desire...Naomi: When I was kidnapped I th...

Last Hope

By Jessica Clare Jen Frederick

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In the explosive new Hitman novel from the bestselling authors of Last Kiss and Last Hit a jungle mercenary and a female target find love on the run...Mendoza: I grew up in the slums and lost every...

Last Hit: Reloaded

By Jessica Clare, Jen Frederick

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With their explosively sexy novels, the bestselling authors of Last Breath, Last Kiss, and Last Hit have proven themselves “a force to be reckoned with.”* Now comes an all-new to-die-fo...

Heart and Seoul

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One woman learns that the price of belonging is often steeper than expected in this heart-wrenching yet hopeful romantic novel and first in the Seoul duology by USA Today bestselling author Jen Fre...

Seoulmates

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A Korean-American adoptee fights to be with the one she loves while coming to terms with her new identity in this enthralling romantic drama and sequel to Heart and Seoul by USA Today bestselling a...

Heart and Seoul

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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.