Complex sentence: Prior to "Idol" he released an independent album entitled "Analog Heart", followed by his post- "Idol" major-label debut "David Cook" which was released on November 18,2008 and has since been certified platinum by the RIAA.
Split into simpler sentences: Prior to "Idol" he released an independent album entitled "Analog Heart". This was followed by his post- "Idol" major-label debut "David Cook" which was released on November 18,2008 and has since been certified platinum by the RIAA.