The Day the Sky Split Apart by Roy A. Gallant is actually a book written for young readers interested in science. When I purchased the book, I didn't realize that it was written for young people (older children and adolescents). Nevertheless, it didn't matter because it's a very good rendition of the story of the event over Siberia in 1908. There were eye witnesses, fire, explosions, tremors and seismic activity detected around the globe. Gallant tells about his own trip to the Tunguska wilderness of Siberia and tells of Leonid Kulik a man who has devoted his life to attempting to unravel the mysterious event that occured. The consensus is that is was a cosmic object. Gallant discusses the importance of studying such events in effort to learn more so that we might prepare for future impacts and their consequences. A very interesting book worth checking out.