It's probably worth saying that Don Lancaster is still around, and has recently been posting his old books as free PDFs on his website. (He's also been collecting all his old magazine articles and columns there, so delving into the site repays effort.) The books are at
https://www.tinaja.com/ebksamp1.shtml ; the TTL, CMOS, and Active Filter Cookbooks are there, as are his earlier RTL Cookbook and contemporary but forgotten TV Typewriter Cookbook, and maybe a half-dozen others. The books have been cleaned up and restored; instead of old, maybe-OCRed scans, he's made these look maybe better than they did in print.