Book excerpt: A practical and easy-to-use book with separately available CD package, Understanding Lung Sounds, Third Edition, guides you through the sounds and skills of lung auscultation. The 60-minute audio CD presents actual lung sounds—teaching you, step-by-step, how to interpret, differentiate, and identify both normal and abnormal lung sounds. Succinct and thorough, this companion book expands on the content in the CD with visual reinforcement to help you better understand what you hear.