Right now I am on Murderbot Diaries book 5. So good. Martha Wells really captures anxiety and depression from an internal standpoint well without it being overbearing. The character growth of the main character over the series has been lovely to read. (ok so I'm reading Sci-Fi....)
Discworld books are great for commute. With a caveat that other people in public transit look at you funny when you start laughing out loud.
I'm currently reading A Thief Of Time on my commute.