Please note there is some creasing and dog ear on the paperback cover. (see photos) Otherwise very clean! The NCCER Heating Ventilating and Air Conditioning Level 4 Trainee Guide 4th Edition is a comprehensive textbook designed for HVAC trainees. Published by Pearson Education in 2014, this 736-page trade paperback guide covers essential topics in the HVAC field. Authored by NCCER, the book features updated ISBN2 9780135185063 and is presented in clear English language. With a focus on the practical aspects of heating, ventilating, and air conditioning systems, this guide serves as a valuable resource for students and professionals in the HVAC industry.