Tim Ferris wrote The 4-Hour Workweek, an eye-opening book, that made i

The way you can decide whether to use That or Which is by checking whether the sentence makes sense even after removing the modifier.

Tim Ferris wrote The 4-Hour Workweek, an eye-opening book, that/which made it to the New York Times Best Seller List.
If we remove the modifier then the sentence becomes :
Tim Ferris wrote The 4-Hour Workweek, an eye-opening book.

This sentence is complete even without the modifier and the modifier is just giving more information about the book. Hence it is a non essential modifier and should use relative pronoun which.

If this sentence is rephrased as : Tim Ferris' book that/which made it to the New York Times Best Seller List, is an eye-opening book.
Now in this case the modifier in red is an essential modifier because if you were to remove it then the sentence would make no sense.
Tim Ferris' book is an eye-opening book.
Which book are we referring to in this sentence ? Tim Ferris may have written a lot of books, hence the modifier is essential here to specify which book we are referring to in this sentence.
Tim Ferris' book that made it to the New York Times Best Seller List, is an eye-opening book.