Kinds of Kindness is a strong option for learners who already feel comfortable with English and want a more demanding challenge. Following the story requires attention, so language difficulty is not the only challenge here. The language mixes everyday English with a few expressions that need attention, so it works best for learners who already have a solid base. At an average of around 72 words per minute, the dialogue is generally manageable, though some exchanges require more attention. It should work best near B2/C1, especially for learners prepared to handle a more complex story.