Superb book ! 
I bought it as a Christmas present from me to me. I assumed it would be worthwhile, a creditable effort, etc etc. But what a treat - my head has been buried in it for much of the holiday.
OK - I'll admit I'm biased. The book neatly spans the exact period of my period of peak interest in motor sport ( 1969-1985 ) and I always took a keen interest in Lauda's career. When I saw it announced, the cynic in me noted two points : 'Competition History' - sounds boring, bound to have masses of lap-time graphs and so on. And 'profusely illustrated' - heard that one before !
Wrong, and wrong. It's very readable indeed. Plus, I had a personal 'litmus test' for the photos. I saw Ickx take Lauda around the outside at Paddock in 1974, and page 142 has the familiar but essential pic of that moment. But - would Niki's efforts in an Alpina CSL at the '73 Spa 1000kms be included ? If it is, it'll for sure be a grainy, indistinct black-and-white, I'll bet.
Wrong again ! Page 120 features a magnificent, sharp, full-colour photo of an exuberantly three- ( almost two- ! ) wheeling BMW hurtling through Malmedy, Lauda at the wheel......
The photos and captions alone are worth the price, but there is so much more to savour here. Congratulations to Jon Saltinstall and publishers Evro who have produced my favourite motor sport title of 2019.