Download Giftology by John Ruhlin PDF book free online. The “Giftology: The Art and Science of Using Gifts to Cut Through the Noise, Increase Referrals, and Strengthen, Client, Retention” is a necessary book for every CEO and entrepreneur. John Ruhlin is the author of this successful book. John is the founder of The Ruhlin Group, a gift logistics company that helps clients like the Chicago Cubs, Wells Fargo, Miami Dolphins and The John Maxwell Company execute year-round gifting strategies. Giftology is a book for every business person, entrepreneur, and salesperson.