You should start with the five albums Parker made with the Rumour in the 70s- Howling Wind, Heat Treatment, Stick to Me, Squeezing Out Sparks and The Up Escalator. These rank with any quintet of albums produced by any artist and SOS is one of the best albums ever full stop. The band reunited after being featured in the GP fan Judd Apatow movie, This is Forty, and recorded two more solid albums Three Chords Good and Mystery Glue in the 10s. He's been very prolific, producing 25 studio albums - all have their moments and many are very good, overall very consistent. He's also done a bunch of live albums, some solo acoustic, others with the Rumour, his later bands and one with the band the Figgs. His most recent album is a solo acoustic version of Squeezing in honor of the 40th anniversary. Dig in, you'll enjoy!