In the history of many bands, there's a kind of sweet spot where creative impact is at its peak. For the Eagles, that year was 1975, with the release of "One of These Nights," which symbolizes this completeness. With "On The Border," their previous album, the band changed producers and welcomed an additional guitarist/vocalist in Don Felder. This addition further enriched the Eagles' palette, giving more depth to the guitar interplay. The Henley/Frey duo reached the pinnacle of their collaboration, and the tracks they co-wrote on "One Of These Nights" speak for themselves: "One of These Nights," "Hollywood Waltz," "Lyin' Eyes," "Take It to the Limit," "Visions," "After the Thrill Is Gone." That same year, the Eagles released a "Greatest Hits" album that was destined to break all sales records, but "One of These Nights" was already a true best-of, a compilation of hits, a succession of classic tracks. Each band member brought their sensibility, broadening and refining the instrumental possibilities; the sound captured by Bill Szymczyk was less raw, less rootsy than Glyn Johns'; it was the true birth of a comfortable and harmonious "Californian" sound. Great compositions, great performances, great sound, great album, a massive album "One of These Nights," which also marked the end of the "country rock" Eagles, ready to make way for the "pop rock" Eagles, and also ready to deliver another masterpiece with their next album.