A book released in 1975, written in the first person in a exceptionally readable/digestable way, this book provides an overview of managing programming projects. Seeing as the book is over 40 years old, I have found the issues identified within the book still pertinent, and the solutions/remediating actions proposed clear and workable.
I would recommend IT project/programme managers read this book, to quote a section
1/3 planning
1/6 coding (doing)
1/4 component testing and early system testing
1/4 system test

Having been in IT for years, I can honestly say, those fractions seem right, in principle 1/2 of the time in a project, we should be looking to test and expect to find issues which require resolution.
Computers
Addison-Wesley Longman
1975
195
The tar pit. The mythical man-month. The surgical team; Aristocracy, democracy, and system design. The second-system effect. Passing the word. Why did the tower of babel fail? Calling the shot. Ten pounds in a five-pound sack. The documentary hypothesis. Plan to throw one away. Sharp tools. The whole and parts. Hatching a catastrophe. The other face.