Swedish music producer and singer. In 1996, using the name Robin Cook, he released the single I Won't Let the Sun Go Down (a cover of Nik Kershaw's debut I Won't Let the Sun Go Down on Me) followed by Comanchero and the album Land of Sunshine in 1997.

Ekfeldt sang and produced I Won't Let the Sun Go Down and all subsequent releases under the name Robin Cook, but appointed Manuel Manci to front and perform, thinking he himself lacked time. The truth of who really was the singer was kept secret until the Swedish newspaper Aftonbladet ran an article in 2002. Yet another single was released in 2002 under the name Robin Cook, titled Susanna with Ekfeldt on the cover.