An Introduction to the Celtic Orthodox Church - Revised Edition

An Introduction to Bioethics: Fourth Edition―Revised and Updated

Introduction to Islam

Introduction to Defense: Second Edition Revised and Updated

Understanding Islam and the Muslims: The Muslim Family and Islam and World Peace

Living Loud: An Introduction to Apologetics for Students, Revised, Third Edition

An Introduction to Linear Algebra and Tensors, Revised Edition

Introduction to California Plant Life, Revised Edition