He was awarded the 2021 Premio Planeta for La Bestia, written alongside Agustín Martínez and Jorge Díaz under the pen name Carmen Mola.
[1][2] He entered the television sector thanks to his father Antonio Mercero, working as writer in Farmacia de Guardia.
[3] Once he left a career in journalism for good, he has since worked in television series such as Hospital Central and La caza.
[6] The trio wrote another novel (La bestia) as Carmen Mola, which was in turn presented as an unpublished work to the jury of the 2021 Premio Planeta under the title Ciudad de fuego and the pen name 'Sergio López'.
[11] In early 2021, he was charged with leading the writing team adapting the Carmen Mola's novel La novia gitana (retrospectively disclosed to be his own work) into a television series format.