Meg: Primal Waters is a 2004 science fiction horror novel by American author Steve Alten. It is the sequel to The Trench: Meg 2 and the third book in the MEG series. The novel continues the adventure of Jonas Taylor, now a middle-aged father of two, eighteen years after the previous novel, as he is hired as a consultant for the reality television series Daredevils, which comes to be plagued by megalodons (megs). The novel's audiobook was narrated by Keith Szarabajka.

The Trench is a 1999 science fiction horror novel by American author Steve Alten. It is the sequel to Meg: A Novel of Deep Terror and the second book in the MEG series. The book continues the adventure of Jonas Taylor, a paleobiologist studying the megalodon, who now discovers another prehistoric monster, Kronosaurus, also thought to have been extinct. A sequel titled Meg: Primal Waters was released in 2004.