Meet the Matryoshka Dolls of Warning
I have PTSD myself, so I know how much it sucks to be blindsided by content you weren't prepared to see.
Tap on the book cover to get general trigger warnings – in this silly example we'll say "Clowns". If you need more specifics, click on the doll to get a description of the action that still keeps the details vague, ie "A character watches an inordinate number of clowns climb out of a car." One more click on the nesting dolls, and you get, "On page 43, Luz watches 22 clowns climb out of a Prius."
Read safe, my darlings. And remember that anyone who makes fun of trigger warnings is a dumbass.