From The Beatles to Beyoncé! Author Eric Wolfson discusses his new book on the shifting identity of the concept album in rock, pop, and hip-hop music with bookseller (and, yes, friend) Justin Remer. The book breaks down 25 albums across five eras, and Eric and Justin get into many of them here. A great chat for veteran music nerds and new fans alike. Produced by Justin Remer. Recorded at LAPL Octavia Lab. Opening music: "Optimism (Instrumental)" by Duck the Piano Wire. Closing music: "Rule of 3s (Solemnity Child)" by Elastic No-No Band.