“501 Spanish Verbs” by Theodore Kendris and Christopher Kendris is a comprehensive language course aimed at foreign language study, specifically focusing on the Spanish language. Published by Kaplan Publishing in 2003, this trade paperback book contains 670 pages filled with verb conjugations in both English and Spanish. The authors provide a valuable resource for learners looking to improve their Spanish language skills with detailed instructions and exercises. With a compact size of 9 inches in length and 6 inches in width, this book is a convenient and practical tool for studying Spanish verbs.