Beaver Towers is about a young boy called Philip who goes out to fly his kite, and gets blown away to a small Island inhabited by Beavers. He meets Baby B, and his grandfather Mr. Edgar, who explains to him that an evil witch called Oyin is about to imprison the whole island and the only thing that could stop her is a purple spell book in the library. Mrs Badger is not impressed but Mr Edgar agrees it is the only way to save the Island. However, in their mission Baby B is captured by the growlers, the evil servants of Oyin whereas Philip manages to escape but with the wrong book. The last thing Philip hears is Baby B saying he (Philip) knows the correct word, a puzzle to which the answer becomes vital later on when Philip attempts to save the young beaver.
This would be a good book for literacy for year 2 or 3 in terms of the plot structure, which is the next step on from a picture book because although there are no pictures, the chapters are very short and simple. There is also a good variation of themes and features of the text, alternating between adventure narrative, description and characterisation which could be used as a good starting point for creative writing and drama. In terms of guided reading, the level is quite hard so would be more suitable for year 4 or high ability year 3. I personally did not enjoy this book, because I found the narrative and characterisation to be excessively stereotyped, for example the clichéd role of the hero, and martyr and scared wife. I also found that the plot was overly simple and the ending was too predictable. However, I was recommended the book by someone my age who studied it in year two and found it so inspirational that he could still remember it, so for this age group as I have outlined above, it would be very useful.