Ernest Keen Books

A Primer in Phenomenological Psychology

By Ernest Keen

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Chemicals for the mind

By Ernest Keen

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Annotation

Ultimacy and Triviality in Psychotherapy

By Ernest Keen

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"In this work, which includes a therapy case study, Keen stresses that pharmacotherapy threatens our access and openness to ultimate issues. This book is essential reading for professionals and sch...

A history of ideas in American psychology

By Ernest Keen

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Depression

By Ernest Keen

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"Most studies of depression focus on psychiatric or medical interpretations. But sadness and guilt are human experiences, Keen asserts, and not disease symptoms. They involve intricate layers of en...

Three Faces of Being Toward an Existential Clinical Psychology

By Ernest Keen

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Three Faces of Being: Toward an Existential Clinical Psychology

By Ernest Keen

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A primer in phenomenological psychology

By Ernest Keen

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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.