The book Redshift Rendezvous from 1990 explores this idea. (TBH the story is a little clunky, but if you like to see someone look at the physics in depth, it's pretty interesting.)
https://www.goodreads.com/en/book/show/1382560.Redshift_Rend...
https://www.goodreads.com/en/book/show/1382560.Redshift_Rend...