Books like Lest Darkness Fall?

Sooo anybody knows any books with a similar premise? Guy gets dropped in the past and has to deal with it. Whether he creates a different timeline or simply adapts to his environment makes no difference to me. I don't mind fantasy/science fiction elements. I only know of 2 books like that:

1632 - An american town gets dropped in the HRE. Freedom/democracy wank tbh. I can accept one protagonist that wants to FREEEEEDOOOOM! Not a whole town of them.

Outlander - Some nurse gets dropped in the XVIII century Scotland and starts cucking her husband with a young scot warrior. But she finds a way to justify being a sloot so it's okay I guess.

I'd appreciate any help or recommendations. Also if you know any other forums/sites where I can post this question pls let me know. Thank you for your time.
 
15 US soldiers in Afghanistan are thrown back to 1453 Constantinoplis just prior to the Ottoman siege of the city. in George Mavro's The Empire Series
 
Top