That's actually not a very good book.
There's a lot of stuff in there that is in opposition to common wisdom, like "never shave against the grain".
Don't get the Liesureguy book either, it's basically 30 percent of the threads here at B&B copied into a book. You can get the same stuff here free.
Here's a free book
Shaving Made Easy.
Though it was written in the early 1900's, and is primarily about straights, there is some very good info there;