The plot of this Marc Brown Arthur chapter book is a good one. When Arthur and his friends find Sue Ellen's diary, they are tempted to read it. They are particularly concerned about what Sue Ellen might have written in it about them. In the meantime, Sue Ellen is frantically searching all over for the diary, which has "Private" and "Do not open" written on the cover. She has had the diary since she started school and is very attached to it. Sue Ellen's friends finally decide to do the right thing and return it to her without peeking inside. In the end Sue Ellen's friends are just a little bit nicer to her knowing that she faithfully records observations about them. The scenario presented gives children food for thought. Be aware of a typographical error on page 19: the word "plan" should be "plain." Based on a teleplay by Peter Hirsch.