Abstract Theory is the debut solo album released by former Five member Abs. The album was released on 1 September 2003, peaking at No. 29 on the UK Albums Chart. The album failed to find success elsewhere, and resulted in Abs being dropped from his record label just months later. The album spawned five singles: "What You Got", "Stop Sign", "Shame", "7 Ways" and "Miss Perfect". The album received mixed to positive reviews from critics, comparing his material to that of his former band, Five.