▁on , ▁eventually ▁expand ing ▁into ▁illustr ating ▁puzz le ▁books ▁and ▁color ing ▁books ▁for ▁k ids ▁and ▁adult s . ▁ ▁In ▁ 1 9 8 0 , ▁M s . ▁H eller ▁visited ▁an ▁artists ' ▁col ony ▁in ▁up state ▁New ▁York , ▁called ▁Y add o . ▁She ▁left ▁that ▁determined ▁to ▁start ▁a ▁new ▁writing ▁career . ▁In ▁ 1 9 8 5 ▁she ▁married ▁Richard ▁G ross ▁who ▁supported ▁her ▁work ▁with ▁enthus ias m ▁until ▁his ▁death ▁in ▁ 2 0 0 2 . ▁ ▁Most ▁of ▁H eller ' s ▁books ▁were ▁published ▁by ▁Gros set ▁& ▁Dun lap . ▁She ▁wrote ▁a ▁brief ▁aut obi ography ▁called ▁Fine ▁L ines ▁which ▁was ▁published ▁in ▁ 1 9 9 6 . ▁ ▁Col oring ▁books ▁These ▁color ing ▁books ▁have ▁designs ▁in ▁them ▁on ▁a ▁wide ▁range ▁of ▁subjects ▁and ▁are ▁appropriate ▁for ▁children ▁or ▁adult s . ▁▁ ▁Color ▁and ▁P uzz le ▁( 1 9 6 8 ) ▁▁ ▁The ▁Oriental ▁R ug ▁Col oring ▁Book ▁( 1 9 7 3 ) ▁ ▁Design s ▁for ▁Col oring ▁ ▁Design s ▁for ▁Col oring ▁( 1 9 7 6 ?) ▁ ▁Design s ▁for ▁Col oring : ▁More ▁Design s ▁( 1 9 7 6 ) ▁ ▁Design s ▁for ▁Col oring : ▁ 3 ▁( 1 9 7 7 ) ▁ ▁Design s ▁for ▁Col oring : ▁ 4 ▁( 1 9 7 7 ) ▁ ▁Design s ▁for ▁Col oring