The 13-Storey Treehouse
My son read this when he was around 8 years old and I wanted to encourage him to read longer books than the 'easy readers' he was used to. The quirky style, hilariously unrealistic storyline and many illustrations really appealed to him. My 7 year old is now reading it and, being a fan of Tom Gates style books, is excited to have discovered this new series. A brilliant book to read to your child, or for them to enjoy alone. Definitely recommend.