Peter Otto Jacobsen Books

A family in the U.S.S.R.

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Text and photographs present the home, work, school, recreations, and day-to-day activities of the Fomin family who lives in the Soviet city of Leningrad.

A family in Central America

By Peter Otto Jacobsen

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Text and photographs present the home, work, and day-to-day activities of the Figueroa family who live in a remote part of Costa Rica.

A Family in Greenland Families Around the World

By Peter Otto Jacobsen, Preben Kristensen

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A family in Colombia

By Peter Otto Jacobsen

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Depicts the life of a Colombian family engaged in coffee picking, painting, and bricklaying in the Tolima region.

A family in Hawaii

By Peter Otto Jacobsen

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Text and photographs present the home life and day-to-day activities of the Stagner family who lives in Hawaii.

A family in France

By Peter Otto Jacobsen

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A family in Mexico

By Peter Otto Jacobsen

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A Family in Holland Families Around the World

By Peter Otto Jacobsen, Preben Sejer Kristensen

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A Family in Colombia Families Around the World

By Peter Otto Jacobsen, Preben Sejer Kristensen

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Family in the Persian Gulf

By Peter Otto Jacobsen

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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.