"Logical Design of Digital Computers", Montgomery Phister, Jr., (c) 1958, 5th printing 1960. hardback w/cover, 400 pages, good shape. "Digital Computer Design", Braun, 1963. hardback, 600 pages, good shape. Shipped from Austin, TX Both have basics of boolean logic, branch out into more system level issues, have detail on memory types and issues, circuit level considerations.