Henry H. Calero was an author and consultant who specialized in the field of communication and negotiation for over three decades. He is most recognized for his book ' which was published in 2005. In addition to this work, Calero also collaborated with Gerard I. Nierenberg on several books, including How to Read a Person Like a Book which was first published in 1971, and The New Art of Negotiating which was released in 2008.
Calero's work emphasized the significance of nonverbal communication and body language in comprehending and interpreting the thoughts and intentions of others. Calero is the author of several books, including: