Ladybird Readers is an ELT graded reader series for children learning English as a foreign or second language . The series includes traditional tales , favourite characters , modern stories and non-fiction - featuring Spot , Peppa Pig and Peter Rabbit and classic authors such as Roald Dahl . Recommended for children aged 3-11 , the eight levels of Ladybird Readers follow the CEFR framework (Pre-A1 to A2+) and include extra learning activities that develop key skills and provide preparation for the Cambridge English tests . Each book is Lexile measured and introduces key vocabulary and character names at the start of each reader. The books are written by language learning experts and include access to online audio , supplementary activities and learning resources including role plays, phrase cards and lesson plans. This Level 4 Reader is A2 in the CEFR framework and includes practice for the Cambridge English A2 Flyers tests. The longer text is made up of sentences with up to three clauses, more past and future tense structures, modal verbs and a wider variety of conjunctions. Forests have been on Earth for millions of years. Lots of animals live in forests, and sometimes their lives can be very difficult.