Lot of vintage technical book electronic switch&switching circuits

Lot of three vintage technical books of electronic switching circuits from the estate of an electrical engineer. There are:

Pulse and Switching Circuits - by Harvey Swearer - 1970 with 254 pages;

Switching Circuits with Computer Applications - by Watts S Humphrey - 1958 with 263 pages and the remains for the original dust jacket;

Electronic Switching, Timing and Pulse Circuits - part of the McGraw-Hill Electrical and Electronic Engineering Series - 1959 with 267 pages.

These are in nice vintage condition with names inside the covers.