Together with the author's sage advise about things to avoid in REALbasic, these instructional code examples will save the programmer countless hours which in itself makes this book well worth the cost.
Programming is a journey, and one's appreciation of a journey is enhanced by a fine companion.
The Definitive Guide is such a fine companion, giving guidance on the untrodden paths, and pointing out items of interest that one otherwise might have missed. The software is good, its official manual is less than perfect, and this third-part book is a delight to the eye and brain. For more experienced readers, it makes a capable reference to the wide range of features available in REALbasic.