i like that book, but its coverage of 'everything' is a bit light.
closer to 'everything' (but still not quite 'everything' is:
Excellence Was Expected (AKA 'EWE'). that, and a copy of Jürgen Barth's "The Porsche Book" will cover most of the early stuff.
then, for completeness, you add Frère's "The 911 Story" and "Das Grosse Buch 914" and you'll have a great historical perspective.
anyway - happy birthday - and enjoy the book !