▁between ▁Ger ro ld ' s ▁cre atures ▁and ▁the ▁mart ian ▁flat ▁c ats ▁from ▁Robert ▁A . ▁Hein lein ' s ▁novel ▁The ▁Rol ling ▁St ones ▁( 1 9 5 2 ), ▁and ▁recommended ▁purch asing ▁the ▁rights ▁to ▁the ▁novel . ▁Instead , ▁Star ▁Tre k ▁producer ▁Gene ▁L . ▁Co on ▁contact ed ▁Hein lein ▁by ▁tele phone ▁and ▁asked ▁that ▁he ▁wa ive ▁the ▁similarity . ▁Hein lein ▁did , ▁but ▁later ▁reg rett ed ▁the ▁decision . ▁In ▁his ▁ 1 9 7 3 ▁book ▁The ▁Tr ouble ▁with ▁Trib bles ▁Ger ro ld ▁discuss es ▁the ▁matter ▁of ▁potential ▁in ad vert ent ▁pl ag iar ism , ▁but ▁he ▁does ▁not ▁admit ▁to ▁it . ▁He ▁claims ▁that ▁instead ▁of ▁money ▁or ▁credit ▁Hein lein ▁asked ▁only ▁for ▁a ▁signed ▁copy ▁of ▁the ▁script ▁and ▁that ▁afterwards ▁that ▁Hein lein ▁wrote ▁to ▁him ▁dismiss ing ▁the ▁similarity , ▁“ we ▁both ▁o we ▁something ▁to ▁Ell is ▁Parker ▁Butler ... and ▁possibly ▁to ▁No ah .” ▁ ▁However , ▁Ger ro ld ' s ▁account ▁does ▁not ▁agree ▁entirely ▁with ▁Hein lein ' s ▁own ▁written ▁re collection ▁of ▁the ▁matter ▁as ▁related ▁in ▁private ▁correspond ence ▁c ited ▁in ▁his ▁author ized ▁aut obi ography . ▁ ▁Re ception ▁In ▁ 2 0 0 7 , ▁W I RED ▁magazine ▁noted ▁the ▁Trib bles , ▁as ▁one ▁of ▁the ▁top ▁ten ▁classic , ▁che es y ▁cre atures ▁of ▁Star ▁Tre k .