Jen Lancaster Books

Bitter is the New Black

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New York Times bestselling author Jen Lancaster takes you from sorority house to penthouse to poorhouse in her hilarious memoir of living the sweet life—until real life kicked her to the curb.She h...

Bright Lights, Big Ass

By Jen Lancaster

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Jen Lancaster hates to burst your happy little bubble, but life in the big city isn't all it's cracked up to be. Contrary to what you see on TV and in the movies, most urbanites aren't party-hoppin...

Such a Pretty Fat

By Jen Lancaster

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A NOTE FROM JEN LANCASTER: "To whom the fat rolls…I'm tired of books where a self-loathing heroine is teased to the point where she starves herself skinny in hopes of a fabulous new life. And I hat...

My Fair Lazy

By Jen Lancaster

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Readers have followed New York Times bestselling author Jen Lancaster through job loss, sucky city living, weight loss attempts, and 1980s nostalgia. Now, in this bitter and witty memoir, Jen chron...

Twisted sisters

By Jen Lancaster

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"A licensed psychologist who stars on the Wendy Winsberg cable breakout show I Need a Push, Reagan helps participants become their best selves by urging them to overcome obstacles and change behavi...

The Tao of Martha

By Jen Lancaster

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One would think that with her impressive list of bestselling self-improvement memoirs Jen Lancaster would have it all together by now. One would be wrong. After all, she’s no Martha Stewart. And th...

I regret nothing

By Jen Lancaster

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The Best of Enemies

By Jen Lancaster

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Bridesmaids meets Big Little Lies in a novel told from the alternating perspectives of two women who define the term frenemies—from New York Times bestselling author Jen Lancaster. Jacqueline Jorda...

Sik?ago daiori

By Jen Lancaster

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Sik?ago daiori

By Jen Lancaster

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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.