English as an Additional Language: Penguin Readers

From https://www.er-central.com/graded-reader-series/penguin-elt/ 

"Penguin Readers are a carefully graded collection of Readers that enable English language learners to enjoy reading whatever their language level.

Penguin Readers are written by specialist ELT authors. The language, vocabulary, style and content of every book is carefully graded to make sure it suits the learner’s own language ability.

Whether it’s British or American English you’re looking for, there are hundreds of titles to choose from. There’s something for everyone – classics, films, biographies, drama, romance, comedy, crime…

Listening to audio recordings can help to improve the learner’s understanding and fluency, which is why the majority of Penguin Readers titles are also available as audio packs.

To help you with lesson planning, every title has its own activity worksheet – extra background information, photocopiable activities, teacher’s notes, answer keys and progress tests for every title."