BTS have some more surprises in store for this year’s BTS Festa, their annual anniversary celebration. In time with the occasion, the supergroup has announced an upcoming slate of book releases publishing in partnership with Hachette Book Group’s Running Press, CAKE Corp, and BigHit Music. On Sept. 15, BTS will release the officially licensed title BTS Lyrics Inside, in which RM, Jin, SUGA, j-hope, Jimin, V, and Jung Kook will dissect the songwriting across their catalog. Songs from Proof and