A new clue, a little early (because I'm off to play handball)...
Clue #1: "Listen, Alice..." "Herbert!"
Clue #2: Crying in the Rain
Clue #3: Cathedral Grove
Clue #4: RRRrrrr! (2004)
Clue #5: the highlight in your Iron Maiden collection
Clue #6: blatant anachronism
Incorrect guesses: The Man Who Would Be King/ King of Twilight/ The Aftermath/ The Man of Sorrows/ Seventh Son of a Seventh Son/ Isle of Avalon/ Rainmaker/ Revelations/ Powerslave/ From Here To Eternity/ Montsegur/No More Lies/ Still Life/ Empire of the Clouds