This document provides a summary of a client project brief for designing social media posters to promote a children's book. It includes mind maps and ideas for the posters, focusing on using bright colors and images from the book. Two initial poster concepts are described - one placing characters on a stage for Twitter, and one in a countryside setting with the book title central for Instagram. Research on competition, the target audience of parents, and exemplar designs is also summarized. The treatment describes how the final posters will attract attention with colorful, fun and simple designs showcasing the characters while keeping to brief requirements.