Its a problem book, and also a teaching book. Intermediate/advanced.

The idea is rather than present the reader with random problems, Reese groups them together by theme (ex. trump control) and suggests the reader study/solve them as a group. Then come back to the book again a year later and try them again, to see if the technique has sunk in.

Excellent problems, of the type you will see at the table. Nothing too advanced that the Intermediate players wont get (no Double Squeezes).