Project X CODE Extra introduces more exciting adventure stories and stimulating non-fiction texts into the Project X CODE series. This pack contains 1 copy of each of the following titles: The Clock Strikes, See the Sights!, Lost Underground, Pyramid Secrets.In line with the phonic, vocabulary and comprehension progression in Project X CODE, these books are ideal for additional practice outside of the core intervention sessions, for introducing children to non-fiction texts, and for children who simply want to read more of the CODE adventure!