Geoffrey Boothroyd, "Fundamentals of Metal Machining and Machine Tools" CRC | 1988-11-15 | ISBN: 0824778529 | 562 pages | djvu | 14.1 MB
a good starting point for students wishing to study the subject of metal machining, as it contains much of the required information in a single source.
Milling Machines & Milling Operations-Second Edition: The Fundamentals of Conventional and CNC Milling by George Haynes English | April 10, 2016 | ISBN: N/A | ASIN: B01E3C7AXU | 468 pages | AZW3 | 15 Mb