Per K. Sorensen Books

The mirror illuminating the royal genealogies Tibetan Buddhist historiography an annotated translation of the XIVth century Tibetan chronicle

By Bsod Nams Rgyal Mtshan., Sakyapa Sonam Gyaltsen

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A provisional list of Tibetological research-papers and articles published in the People's Republic of China and Tibet

By Per K. Sorensen

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Thundering Falcon

By Per K. Sorensen

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Thundering Falcon is the second of two significant ethno-historical studies of the Yarlung region and neighboring valleys of Central Tibet by the research team of Per K. Sørensen, Guntram Hazod, an...

Rulers on the Celestial plain

By Per K. Sorensen

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A monumental academic study of the monastic complex of Tshal Gung-thang and sKyid-shod, the Lhasa valley, offering an extensive contribution to the historical study of early and late medieval Tibet...

Rare Texts from Tibet

By Per K. Sorensen, Sonam Dolma

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Rare Texts from Tibet

By Per K. Sorensen

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Seven rare texts from Tibet. Includes an introduction for each text in English by Per K. Sorensen and Sonam Dolma.

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.