The series was inspired by Childe Roland To The Dark Tower Came by Robert Browning.
Books in this series:
... Arachnoid cysts[?] Arachnoiditis[?] Arakawa'sa syndrome II[?] Arbovirosis[?] Arc syndrome[?] Aredyld syndrome[?] AREDYLD[?] Arginase deficiency[?] ...