Joe Manganiello: 'Evolution' Barnes & Noble Book Signing!

Joe Manganiello flashes a smile while attending a signing of his new book “Evolution” at Barnes & Noble bookstore at The Grove on Tuesday (December 17) in Los Angeles.

The 36-year-old actor was joined by his collaborators Arnold Schwarzenegger and trainer Ron Mathews at the fan event.

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“Had a blast with my friends and collaborators @Schwarzenegger and @Ron_MathewsLAB tonight at the LA #EVOLUTION book signing!,” Joe tweeted. “Thank you to everyone who came out to the Grove @BNEvents_Grove to support #EVOLUTION tonight!”

15+ pictures inside of Joe Manganiello at his “Evolution” book signing…