This book titled "Virology: A Practical Approach" by B. W. J. Mahy is a valuable resource for anyone studying or interested in the subject. Published in 1985, it is a paperback edition that covers various aspects of virology in a comprehensive and practical manner. The book is suitable for adult learning and university students, as well as anyone seeking to gain a deeper understanding of virology. It is an excellent reference guide that provides valuable insights into the subject, and is a must-read for anyone interested in the topic.