David Kennerly has been one of my photo heroes since my mother bought me his book "Shooter" for Christmas one year (a wonderful book). Kennerly won the Pulitzer Prize for his coverage of the Vietnam war (and is, I believe, one of only a few Pulitzer Prize winners from that war to still be alive). He was also Gerald Ford's personal photographer and was the first photographer in history to have almost unlimited access to a sitting president.
I'm not big fan of cell-phone photography, but I've seen a lot of Kennerly's work shot with the iPhone that he has shared on Facebook and it's quite amazing. To create this book he spent a year (2013) traveling around the world shooting a photo a day with the iPhone. The book contains anecdotes, essays and tips on iPhone photography. he book. In the Amazon description it says, "Along the way he discovered that paring down his formidable photo arsenal to a single, simple camera forced him to sharpen his eye and made him an even better photographer." And what a good lesson that is for all photographers: create the images in your brain and the camera will follow!
Holidays coming, great present!