Intel Corporation publishes a number of books on the IA family of processors:
Intel Corporation, Pentium Pro Family Developer's Manual, Volume 1, 1996. ISBN 1-55512-250-0.
Intel Corporation, Pentium Pro Family Developer's Manual, Volume 2, 1996. ISBN 1-55512-260-4.
Intel Corporation, Pentium Pro Family Developer's Manual, Volume 3, 1996. ISBN 1-55512-261-2.