Carlos is a bus driver. In Stop the Bus!, Carlos takes everyone where they need to go. This book is in Light Blue Book Band, Oxford Level 4, and supports Letters and Sounds Phase 4. Project X Hero Academy Non-fiction is a diverse and inspiring series of fully-decodable titles for reading practice that's matched to phonics knowledge. Aligned to Letters and Sounds, this contemporary series broadens children's subject knowledge, while consolidating their phonics learning and improving their reading fluency.