Bonus: Second Position by Katherine Locke is not demisexual on page, but is a great choice for those seeking a demi m/f romance, and features an amputee hero
Bonus: On the more erotic front, there’s The Fling by Rebekah Weatherspoon (f/f), whose Sated and So Sweet also fit the list as m/f bisexual interracial romances!
Double Bonus: For Historical, check out Wanted, a Gentleman by KJ Charles (m/m)
All links are Amazon Affiliate links; proceeds go back into LGBTQReads.com. All works on this list are from 25-150 pages, for your quick-reading pleasure! (With thanks to the Tumblr Asker who inspired this post and the SFF novella post to come!)
Bonus: I try to avoid using a single author twice, but like, come on: Fast Connection by Megan Erickson and Santino Hassell
Double Bonus: The MC of The Girl Next Door by AJ Cousins isn’t bi, but his (female) love interest is very openly so, and let’s just say he’s down with straddling heteroflexible lines.