Martin's Big Words: The Life of Dr. Martin Luther King, Jr. - Doreen Rappaport, Bryan Collier
My immediate reaction to this book was extremely positive. From inside out it is a remarkably visually appealing book - making it a fantastic one to share with young children as it's sure to grab their attention too. And I completely love the idea of using King's own words to build the narrative.

It's not a perfect book as it's (understandably) a bit simplistic (see my friend Abigail's review for an interesting perspective). It also could raise some questions which parents of very young children aren't quite ready to answer. I recommend previewing before reading and preparing for further discussion. All in all, however, highly recommended!