Jen Lancaster Books

Twisted Sisters

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New York Times bestselling author Jen Lancaster is “as adept at fiction as she is at telling her own stories” (Publishers Weekly, starred review). And now in her new novel, reality gets...

I Regret Nothing

By Jen Lancaster

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THE NEW YORK TIMES BESTSELLERNew York Times bestselling author Jen Lancaster has lived a life based on re-invention and self-improvement. From Bitter Is the New Black to The Tao of Martha, she&rsqu...

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. Jacqu...

By The Numbers

By Jen Lancaster

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The New York Times bestselling author of The Best of Enemies serves up a hilarious new novel of the “sandwich generation.”   Actuary Penny Sinclair has a head for business, and sh...

The Best of Enemies

By Jen Lancaster

Average: 0.00, 0 Ratings

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. Jacqu...

By The Numbers

By Jen Lancaster

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The New York Times bestselling author of The Best of Enemies serves up a hilarious new novel of the “sandwich generation.”   Actuary Penny Sinclair has a head for business, and sh...

I Regret Nothing

By Jen Lancaster

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The Tao of Martha

By Jen Lancaster

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One would think that with Jen Lancaster’s impressive list of bestselling self-improvement memoirs—Bitter Is the New Black; Bright Lights, Big Ass; Such a Pretty Fat; Pretty in Plaid; My...

Pretty in Plaid

By Jen Lancaster

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Unabridged CDs * 7 CDs, 9 hoursThe hardcover debut from the New York Timesâ€“ bestselling author of Such a Pretty Fat.

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....

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.