Is Sinclair Lewis taught at the high school level? I don’t remember encountering him, with Babbitt, until I was well into my twenties. He was the first writer from the United States to win a Nobel Prize in Literature. I don’t remember seeing his books around the high school in which I served for ten years.
If you just want to introduce him to your students, or settle them after a class change, or both, here is a Cultural Literacy worksheet on Sinclair Lewis that shouldn’t take anybody long.
If you find typos in this document, I would appreciate a notification. And, as always, if you find this material useful in your practice, I would be grateful to hear what you think of it. I seek your peer review.