"A Picture Book of Martin Luther King, Jr." by David A. Adler is a highly rated picture book biography appropriate for children ages six and up. Amazon.com users give the book a rating of 4.7 stars out of a possible 5.
"A Picture Book of Martin Luther King, Jr." is 30 pages long and published by Holiday House. It serves as a highly effective, empathetic way to introduce the life and legacy of Martin Luther King, Jr. to young children, says Publishers Weekly.
"Martin's Big Words: The Life of Dr. Martin Luther King, Jr." by Doreen Rappaport is another highly rated pictorial biography and is appropriate for children ages five and up. It has a rating of 4.5 stars out of a possible 5 by Amazon readers, is 40 pages long and is published by Hyperion Book CH. It provides an ideal introduction to this great leader and his works, says Publishers Weekly.
A third book is "Who Was Martin Luther King, Jr.?" by Bonnie Bader, which is rated 4.7 out of 5 possible stars by Amazon readers and was published by Grosset & Dunlap. At 112 pages, it is a longer book and is appropriate for children ages eight to twelve. All of these works can be located on Amazon and Goodreads.