Gaonkar doesn't just list technical specifications; he explains the why behind the design. The 8085 serves as the perfect pedagogical tool because it is complex enough to be functional but simple enough to be completely understood by a single human mind.
First published by Prentice Hall and updated through various editions (with the 2014 edition remaining a staple), this book has arguably taught more students the fundamentals of microprocessing than any other text. Gaonkar doesn't just list technical specifications
Microprocessor Architecture, Programming and Applications with the 8085 Programming and Applications with the 8085