Sonic Boom does justice to the label’s accomplishments and Carlin’s business reporting is sound. Still, one wishes he had understood the cultural context in which Warner flourished a bit more. After all, it’s not easy to sell a culture — especially one rooted in the 1960s DIY counterculture — back to those who created it. Future generations may read Sonic Boom and wonder what the big deal was. I suggest they acquire some of the records, and marvel.