Books by Rabbi Aryeh Kaplan:
“The Living Torah”
“Jewish Meditation”
“Meditation and the Bible”
“Meditation and Kabbalah”
“The Aryeh Kaplan Anthology, Volumes I and II”

Steven Siebold, “177 Mental Toughness Secrets of the World Class”
Commander Mark Divine, “The Way of the Seal”
Napoleon Hill, “Think and Grow Rich”
Shad Helmsetter, “What to Say When You Talk to Your Self”

Rambam Mishneh Torah, Touger translationBhante Gunaratana, “Mindlfulness in Plain English” 

Jose Faur, “Homo Mysticus”

Rabbi David Fohrman – “ The Beast That Crouches at the Door” 

Rabbi Samson Raphael Hirsch, “Etymological Dictionary of Biblical Hebrew”