The Scorched Earth Trilogy is a group of three B.P.R.D. mini-series that together form a larger arc.
The three are:
Additionally, the story Out of Reach was published as an introduction to The Warning, making it an introduction to the entire trilogy. The Scorched Earth Trilogy serves as the conclusion to The Plague of Frogs Cycle and are collected together in the fourth B.P.R.D. Plague of Frogs omnibus edition.