Agustín Martínez is a Spanish noir fiction novelist and screenwriter. He was awarded the 2021 Premio Planeta for La Bestia, written alongside Antonio Mercero and Jorge Díaz under the pen name Carmen Mola. From Wikipedia
Official tallies show Top 10 placement in 80 countries—number one across major markets including Spain, France, Mexico, Argentina, Brazil, Colombia, Italy and Turkey, with a top‑four rank in the U.S.