Music is art, according to Los Angeles–based musician and sound engineer Dan Alexander, who, since 1967, has bought and sold vintage recording gear (he’s also credited with coining the term “vintage” in the context of audio). This philosophy charges his forthcoming book, Dan Alexander Audio: A Vintage Odyssey (Rowman & Littlefield), a lyrical, emotive study of classic audio equipment. The 440-page tome comes with all the geekery one expects from a seasoned audiophile like Alexander, whose expert eye dissects products by 22 manufacturers, illustrated by hundreds of never-before-seen photographs and original sales brochures. There are also elaborate lists, including a catalogue of the more than 7,500 pieces of gear he sold between 1979 and 2000 (complete with each piece’s serial number, sale price, and buyer), as well as an inventory of every type of microphone produced by the German manufacturer Telefunken from 1928 to 1980.