Imagine taking three separate books somewhat related in subject
and writing style, tearing them up into packets and shuffling them together. That is a bit like what reading Door to Door was like.
There were some interesting facts on the manufacturing of some products: aluminium and the iPhone for example. There was also some great ideas and arguments for self driving cars.
I'm not entirely sure wading through the fragmented prose was worth those nuggets - though I imagine I am now just that much more interesting to speak to at parties ... assuming you find manufacturing aluminium, the iPhone or ideas around self driving cars interesting.