My 9 year old is very resistant to books - although a good reader he'd rather be on the computer! - but this book grabbed his attention right from the start. The story was simple but well constructed and full of interesting details with delightful characters that my son, who has mild ASD, could understand. The eponymous hero is bright and curious, constantly asking questions (just like my boy!) and all his questions are answered clearly, concisely and simply, without talking down to him.
Since reading the book, and it's follow on volume, my son now has enormous enthusiasm for information about the universe and our place in it and also seems to have begun to understand that the motivation of characters in books and people in real life should be deciphered not just from their exact words but also from their intonation, past behaviour and subsequent actions.
At the age of three he asked me "What is above the sky?" and now someone has been able to explain both the universe and the nature of friendship to him. I really can't praise this book enough!! Thank you, Lucy!