▁Font ana ▁Books ▁series . ▁Later ▁Font ana ▁Books ▁became ▁a ▁Collins ▁im print ▁complete ▁with ▁its ▁own ▁series , ▁including ▁the ▁Font ana ▁Mon arch s , ▁the ▁Font ana ▁African ▁F iction ▁series ▁and , ▁from ▁ 1 9 7 0 , ▁the ▁Font ana ▁Modern ▁Masters , ▁a ▁series ▁of ▁pocket ▁gu ides ▁to ▁influ ential ▁writers , ▁philosoph ers ▁and ▁other ▁think ers ▁and ▁the or ists ▁of ▁the ▁tw enti eth ▁century . ▁Other ▁William ▁Collins ▁S ons ▁im print s ▁included ▁Font ana ▁L ions ▁and ▁Font ana ▁Young ▁L ions , ▁which ▁published ▁books ▁for ▁children ▁and ▁te en agers , ▁and ▁G raft on ▁Books . ▁ ▁Collins ▁founded ▁its ▁New ▁Natural ist ▁series ▁of ▁nature ▁books ▁relevant ▁to ▁the ▁British ▁Is les ▁in ▁ 1 9 4 5 , ▁with ▁But ter f lies ▁by ▁E . ▁B . ▁Ford . ▁The ▁most ▁recent ▁three ▁volumes ▁appeared ▁in ▁the ▁summer ▁of ▁ 2 0 1 5 . ▁ ▁News ▁Corporation ▁acquired ▁a ▁ 4 0 % ▁st ake ▁in ▁ 1 9 8 1 . ▁In ▁ 1 9 8 3 , ▁Collins ▁acquired ▁the ▁publishing ▁operations ▁of ▁Gran ada . ▁News ▁Corporation ▁became ▁sole ▁owner ▁in ▁ 1 9 8 9 . ▁In ▁ 1 9 9 0 , ▁the ▁company ▁was ▁merged ▁with ▁US ▁publish er ▁Har per ▁& ▁Row ▁to ▁form ▁Har per Coll ins . ▁Collins ▁became ▁an ▁im print ▁of ▁Har per Coll ins . ▁ ▁On ▁ 8