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This is excellent. I bought a ton of Who Is books for homeschooling. My 8 yr old hates reading. I tried to get books I thought he might find interesting. He read this one in a day, which is probably the most he ever read. I stopped reading what I was reading and read it with him because it was that interesting.
I love this series. I have taught history for years, and these little books have still taught me so much I didn't know before. The Chicago Fire is one I just finished. Outstanding bit of research and explanation. The side bars are also outstanding. I have asked students to read them and they enjoyed them, too. They add a depth to history which simply is impossible in texts.