Brown, Don. America is Under Attack: The Day the Towers Fell.
My daughter was 3 when 9/11 occurred, so when she had to do a project on it for 8th grade language arts, she had no real memory of the event. This slim volume is aimed at children who would not know any of the details. It follows the time line of events from the point of view of several people involved, showing that some people survived but many others did not. Paired with other books, such as Valerie Bodden's The 9/11 Terror Attacks or Mitch Frank's Understanding September 11th, this will be a valuable resource.
Strengths: This was very informative, and presented in a way that would make sense to even younger students. For older students, it gives a quick overview of the main events, which they need for projects such as my daughter did. Will definitely buy this one for the collection. I can see this being used as a read aloud as well.
Weaknesses: The illustrations make this less scary for younger students, but I would have preferred some photographs.