In Search of Sunrise (ISOS for short) is the title given to a trance mix-compilation series by Tijs Verwest uner his most well known pseudonym DJ Tiësto, and just Tiësto from the fourth installment onwards. The series, currently up to its seventh installment, has been released by Tiësto on the label Magik Muzik, a subdivision of Black Hole Recordings. It debuted on the Billboard 200 at #170 with 4,200 sales.