Wesley R. Gray Books

DIY Financial Advisor: A Simple Solution To Build And Protect Your Wealth

By Jack R. Vogel, Wesley R. Gray, David P. Foulke

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Quantitative Value, + Web Site

By Tobias Carlisle, Tobias E. Carlisle, Wesley GRAY, Wesley R. Gray

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"Quantitative Value is a must-read for those with a love of value investing and a desire to make the investment process less ad-hoc." —Tony Tang, PhD, Global Macro Researcher and Portfolio Manager,...

Quantitative Value

By Tobias E. Carlisle, Wesley R. Gray

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A must-read book on the quantitative value investment strategyWarren Buffett and Ed Thorp represent two spectrums of investing: one value driven, one quantitative. Where they align is in their beli...

Quantitative Value

By Tobias E. Carlisle, Wesley R. Gray

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Quantitative Value

By Tobias E. Carlisle, Wesley R. Gray

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DIY Financial Advisor

By Wesley R. Gray, David P. Foulke, Jack R. Vogel

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DIY Financial Advisor

By Wesley R. Gray, David P. Foulke, Jack R. Vogel

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The 52-Week Low Formula: A Contrarian Strategy That Lowers Risk, Beats The Market, And Overcomes Human Emotion

By Luke L. Wiley, Wesley R. Gray, Luke L. Wiley, Wesley R. Gray

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**A new but timeless strategy and mindset that should greatly help investors lower downside risk while achieving market outperformance** __In The 52-Week Low Formula: A Contrarian Strategy that Low...

The 52-Week Low Formula: A Contrarian Strategy That Lowers Risk, Beats The Market, And Overcomes Human Emotion

By Luke L. Wiley, Wesley R. Gray, Luke L. Wiley, Wesley R. Gray

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A low risk, contrarian approach to investing that has proven itself in today's marketsIn The 52-Week Low Formula: A Contrarian Strategy that Lowers Risk, Beats the Market, and Overcomes Human Emoti...

Quantitative Momentum

By Wesley R. Gray, Jack R. Vogel

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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.