Helga Christoffersen Books

Carol Rama

By Massimiliano Gioni, Helga Christoffersen

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This catalogue includes works from Rama's early 1930s watercolor drawings, which anticipated debates on sexuality, gender and representation, to her "mad cow" series of the late 1990s and early 200...

Marta Minujin

By Lisa Phillips, Massimiliano Gioni, Marta Minujin, Zanna Gilbert, Helga Christoffersen

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Nicole Eisenman

By Massimiliano Gioni, Helga Christoffersen, Nicole Eisenman, Grace Dunham

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Cally Spooner

By Hendrik Folkerts, Cally Spooner, Helga Christoffersen, Dan Graham

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Daiga Grantina

By Sara Fumagalli, Helga Christoffersen, Andrew Berardini, Valentina Gervasoni, Daiga Grantina

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Furla Series 01 Time after Time Space after Space

By Hendrik Folkerts, Aram Moshayedi, Helga Christoffersen, Bruna Roccasalva, Jean Pierre Criqui

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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.