Cyril's currently recommended minimum IBM book list

The two best books on IBM are

The Maverick and His Machine – Maney

Building IBM: Shaping an Industry and Its Technology -- Emerson W. Pugh

The book with the most flavor is

Inside IBM: The Watson Years -- William W. Simmons

Second is

How They Achieved – Lucinda Watson (daughter of TJW, Jr.)

The oddest book is

And Tomorrow…the World -- Rex Malik

The following are pretty much mandatory

IBM’s 360 and Early 370 Systems -- Emerson W. Pugh, Lyle R. Johnson, and John H. Palmer
IBM’s Early Computers -- Charles J. Bashe, Lyle R. Johnson, John H. Palmer, Emerson W. Pugh
Father, Son & Co. – Watson and Petre
A Business and Its Beliefs: The Ideas That Helped Build IBM – Watson (Jr.)

Cyril liked

The Computer Establishment – Katherine Fishman
The Sun Never Sets on IBM -- Foy
The Romance Division…a Different Side of IBM -- Deloca and Kalow

Cyril edited

IBM System/38 Technical Developments (1978 IBM General Systems Division) – ISBN – 0-933186-00-2

Indirectly about IBM (and also edited by Cyril)

Design & Memory: Computer Programming in the 20th Century - Peter H. Huyck and Nellie W. Kremenak