His Name Was Raoul Wallenberg: Courage, Rescue, and Mystery During World War II by Louise Borden is written in free verse and contains many photographs which bring life to the text. It begins with his birth in 1912 and continues until January 1945 when Wallenberg and his driver were arrested by the Soviets under orders of Stalin. What happened and is related between 1912 and 1945 is a remarkable story. In fact, it was so remarkable that the book was the 2013 Sydney Taylor Book Award for Older Readers by the Association of Jewish Libraries.
Here is an interview with the author on Randomly Reading's blog.