A Song of Ice and Fire, 5-Book Boxed Set: A Game of Thrones, A Clash of Kings, A Storm of Swords, A Feast for Crows, A Dance with Dragons (Song of Ice & Fire 1-5)

by George R.R. Martin

And there were wyrms in that red darkness too.” “Earthworms?” she asked, frowning. “Firewyrms. Some say they are akin to dragons, for wyrms breathe fire too. Instead of soaring through the sky, they bore through stone and soil.

GASP like ACOTAR