Cass Biehn (they/them) writes messy queer characters in messier situations—and always with angsty kissing.

They hold a Master of Library Science from Aberystwyth University in Wales and currently live in the Utah desert, where they split their time between cosplaying and wrangling their dogs. Cass' debut novel, VESUVIUS, is out now from Peachtree Teen in the US and Atom Books/Little, Brown in the UK. The sequel, ICARUS FELL, will release in June 2027, with a standalone third novel THOUGH THIS BE MADNESS to follow in 2028.