Daniel - Gilbert, AUTHOR of the book, is an American social psychologist and a well -known writer. Daniel is currently a professor of psychology at Harvard University, and he has articles published in a large number of public newspapers and magazines, as he hosted a short TV series and spoke at well -known TED conferences more than once, and has a famous academy in the field of "emotional speculation", that is, how to speculate a person With his feelings and emotions in the future, a topic that intersects - to a great degree - with his book.