When our first child was just over 1 year old it was very difficult getting him to go to bed. I went to the library thinking that reading a story might help to settle him in the evening, and this is the first one I read to him. He lay in bed staring at the pictures while I read, and when I'd finished he looked at me with what appeared to be amazement. "Again? more?" he asked. I read the story 5 more times. The following evening when I said it was time for bed and that we could read Fire Engine Lil again he ran to his bed in excitement.
Over the next 15 years I read stories to him and then his younger brother almost every night. It was probably the highlight of my life, reading to them and discovering or re-discovering stories I loved with them.
Maybe I'd be telling this story about a different book if I'd chosen another, but I still have to give Lil 5 stars.