Forget the Nimzo-Indian. The idiotproof answer to d4 is the (1. d4 d5 2. c4 c6).
When you use the idiotproof repertoire from the PDF below, you use 10% of your brain energy in the opening. You arrive at move 15 with a full clock and fresh eyes. You spot tactics your opponent misses because they are still trying to remember if the Bishop goes to b4 or c5. an+idiotproof+chess+opening+repertoire+pdf+link
If you're looking for a review of a specific PDF, I'd recommend checking online chess communities, forums, or websites that specialize in chess reviews. You can also ask the author or publisher for a description of the content and structure. Forget the Nimzo-Indian
: This hybrid approach specifically avoids the Exchange Slav ( c4 c6)
Do not print the PDF and put it in a drawer. Do not read it once and close it.