Synopsis: Len's Star Rating: 9 out of 10. An excellent book on longevity.

Len's Star Rating: 10 out of 10. An eye-opening book on the harmful impact of loneliness and the power of connection to heal its wounds.

Len's Star Rating: 7 out of 10. A book that provides the backstory, rationale, and research that supports the X3, a muscle-building variable resistance system.