The most useful information that I found in this book is the clear explanation of the new features of Pentium processor that are not found in earlier 8086 to 80486 processors. Several chapters are dedicated to the Pentium Data and Instruction Cache Memory Architecture for both system with single and multiple processors. Note that this book is not for a beginner. If you don't know anything about Cache Memory architecture from earlier Intel CPU then this book is not for you. The earlier books in Mindshare PC System Architecture Series which are ISA System Architecture, EISA System Architecture and 80486 System Architecture should give sufficent background to read this book.