My daughter (6yrs) bought this home as part of her school reading. What a welcome relief from the dreadful Biff and Chip characters. It has 5 or six chapters so you can space the reading. It was one of the first books that my daughter brought home that I wanted to read too and couldn't wait to find out the ending.
Hetty and her friends go in search of a cure for Baby Waah who won't get better. They visit the Oracle, meet the Harpie, the Hydra and visit the Pool of Fears. Lord of the Rings for 6 year olds! Much of the text is in speach bubbles so it encourages your child to read as they want to read the bubbles. It has quite long words so they really have to use their phonics to work out the word. It was a joy to share the reading of this book with my child. I highly recommend it.