This prescriptive self-help book by acclaimed friendship coach, expert, and sociologist Dr. Jan Yager, author of the international hit titles When Friendship Hurts (in 29 languages) and Friendshifts (in nine languages) now looks at how the right friends can extend your life and even delay or avoid the onset of dementia and how the wrong ones can have catastrophic effects.

Friendgevity also explores the impact of social media on friendship, healing friends, as well as frenemies and fatal friends. Based on extensive original research, including interviews with pairs of friends, Friendgevity offers insights into dealing with friendship over the life cycle, friendship at work and in business, making friends, coping with friendship conflicts, and lots more.

Friendgevity includes a bibliography and resource section as well as recommended day-by-day activities to follow to celebrate the annual International New Friends, Old Friends Week in May that Dr. Yager founded more than 20 years ago.

Here's what they're already saying about Dr. Yager's new friendship title:

"Friendgevity is an astoundingly provocative read on a topic that remains so important to all of us. This is a book that provokes self-awareness and, at the same time, provides a usable road map to understanding the questions, fears, and celebration we experience around the friendships we value so much in our lives. Bravo Dr. Yager and thank you.” (Liz Pryor, author of What Did I Do Wrong?: When Women Don’t Tell Each Other the Friendship Is Over and Look at You Now)

For more on this author, who has been interviewed about friendship on The View, the Today Show, Good Morning America, Nightline, CBS This Morning, CBS Sunday Morning, and other shows, go to www.drjanyager.com.