Early (1960s) IBM books :-
"System 360 Assembler Language Coding, Standard and Decimal Instructions - Text"
"Programmed Instruction Course System/360 Assembler Language Coding, System Review, - Text"
"System/360 Assembler Language Coding, Sample Programs - Programmed Instruction"
"Programmed Instruction Course System/360 Assembler Language Coding, Appendix"
"An Introduction to the IBM System/360 Computer " by Gordon B. Davis
"IBM Systems Journal Volume 12/Number 2/1973
All in sound condition despite showing signs of their age; a couple of the covers are slightly grubby but inside is fine