Here are the possible solutions for they appear in installments clue
Answer
Clue
Relevancy
serials
Clue
They appear in installments
rockbottom
Clue
With 133, the name of the band whose members appear in the theme answers. (They disbanded in 2012 after raising millions for literacy, but they're reuniting this weekend for one last concert.)
annakarenina
Clue
Classic that originally ran in serial installments of The Russian Messenger
