1) All time to come 2) Always 3) Always, quaintly 4) American fantasy novel 5) Arkham House book 6) At all future times 7) At any future time 8) Continually 9) Eternally is always extra 10) For a limitless time 11) Forever 12) Forevermore 13) From here to eternity 14) From now on 15) Henceforth 16) Horror anthology Found on https://www.crosswordclues.com/clue/evermore
Ev`er·more' adverb During eternity; always; forever; for an indefinite period; at all times; -- often used substantively with for . « Seek the Lord . . . Seek his face evermore .» Ps. cv. 4. « And, behold, I am alive for evermore .» Reintran... Found on http://www.encyclo.co.uk/webster/E/77