Jacob Needleman Books

Lost Christianity

By Jacob Needleman

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New religions.

By Jacob Needleman

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Time and the Soul

By Jacob Needleman

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In Time and the Soul Jacob Needleman uses stories-of a middle-aged psychiatrist going back in time to encounter his younger self; of a mysterious meeting in the Central Asian desert; of the mystic...

The American Soul

By Jacob Needleman

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Looking at the lives of America's founders-including Washington, Jefferson, and Franklin-scholar and bestselling author Jacob Needleman explores their core of inner beliefs; their religious and spi...

Lost Christianity

By Jacob Needleman

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Unavailable for several years, Lost Christianity is a profound reexamination of the essence of Christian thought and faith. Philosopher and bestselling author Jacob Needleman has sought out the anc...

Why Can't We Be Good?

By Jacob Needleman

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The widely respected social philosopher embarks on his most gripping and broadly appealing work, asking the ultimate question of human nature: Why do we repeatedly violate our most deeply held valu...

I Am Not I

By Jacob Needleman

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In this “striking” meditation on the relationship between the adult self and the inner child, Jacob Needleman presents excitingly “original positions” on age old spiritual a...

The New Religions

By Jacob Needleman

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Philosopher Jacob Needleman's groundbreaking study of America's alternative spiritual movements is back in print with a new introduction by the author.Originally published in 1970, The New Religion...

What Is God?

By Jacob Needleman

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In his most deeply personal work, religious scholar Needleman cuts a clear path through today?s clamorous debates over the existence of God, illuminating an entirely new way of approaching the ques...

Why Can't We Be Good?

By Jacob Needleman

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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.