aro & ace books: grey-ace & acespec
either specifically grey-ace, or where they're clearly some sort of ambiguously acespec (but not specifically demi). Ambiguity either from the setting/writing/context, or the character is questioning/unsure.
find grey-aroace/aroacespec books here, and demisexual here
A Letter to the Luminous Deep - sff duology, ace or acespec coded MCs (2/4), m/f
The Hands of the Emperor/At The Feet of the Sun - high fantasy series, greyace/acespec man MC, m/m qpr
After the Dragons - scifi novella, maybe greyace MC (1/2), m/m
Nophek Gloss - scifi trilogy, acespec (maybe arospec) man MC, maybe acespec woman MC
She Who Became The Sun - historical fantasy duology, nonbinary acespec MC (1/2*),
The Unbalancing - high fantasy novella, demi/greyace nonbinary MC (1/2)
Bloody Spade - YA urban fantasy, greyace/acespec girl MC (1/4), m/f
The Many Half-Lived Lives of Sam Sylvester - YA contemporary/paranormal - nonbinary MC 'on the ace spectrum'
Kiss Me Maybe - contemporary romance, explicitly grey-ace lesbian MC, f/f
#aspec books / aspec database / tumblr masterpost
info included here is brief! please see my database for full details of the books