This book is part of the Ladybird Readers series, designed for children aged 3 to 11 who are learning English as a foreign language. The story follows Pablo, a boy who can't sleep in the dark. He draws his friends to feel better. The sentences are short, contain a maximum of two clauses, and use the present tense with some simple adjectives. Each book includes activities to develop reading, writing, speaking, listening, and critical thinking skills, and provides preparation for Cambridge English Pre-A1 to A2 exams (YLE). It also offers free online resources, such as audio, answer keys, lesson plans, and tips for parents.