I read Gabriel s authorized biography from my library and there s plenty that can be done using it as a source especially considering the man himself is a fan of Wikipedia but his pages are crap As for listening So is as good an entry point as any but if I had to pick a single song might as well go for Solsbury Hill first Cracking pop song that Personally I m really partial to his work with Genesis which is only now receiving the critical appraisal is deserves due to renewed interest in prog so if you have ten minutes free check out this awesome performance of The Musical Box