▁at ▁all . ▁ ▁Re views , ▁Cit ations ▁& ▁Leg acy ▁▁ ▁Although ▁the ▁book ▁was ▁never ▁a ▁best s eller ▁and ▁has ▁spent ▁much ▁more ▁time ▁out - of - print ▁than ▁in ▁print ▁since ▁its ▁publication , ▁it ▁has ▁non eth eless ▁att ained ▁a ▁cult ▁following ▁and ▁been ▁frequently ▁c ited ▁by ▁many ▁publications ▁and ▁online ▁resources . ▁ ▁Perhaps ▁the ▁book ' s ▁most ▁last ing ▁legacy ▁is ▁the ▁contribution ▁it ▁made , ▁al beit ▁unw itting ly , ▁to ▁the ▁adult ▁h ob by ▁of ▁card ▁collect ing . ▁ ▁Harris ▁and ▁Bo yd , ▁like ▁many ▁other ▁boys ▁who ▁grew ▁up ▁in ▁the ▁ 1 9 5 0 s ▁and ▁ 1 9 6 0 s , ▁collected ▁cards ▁as ▁youth s , ▁lost ▁interest ▁in ▁the ▁h ob by ▁in ▁their ▁te en ▁years , ▁and ▁re kind led ▁the ▁h ob by ▁in ▁their ▁adult ▁years . ▁ ▁The ▁difference ▁was ▁that ▁Harris ▁and ▁Bo yd ▁actually ▁wrote ▁a ▁book ▁about ▁it ▁because ▁at ▁the ▁time ▁there ▁were ▁no ▁others . ▁ ▁References ▁ ▁External ▁links ▁▁ ▁http :// www . er ic enders . com / books 3 _ bb card . htm ▁( a ▁review ) ▁ ▁https :// www . base ball - reference . com / b ull pen / The _ Gre at _ American _ Base ball _ Card _ F li pping % 2 C _ Tr ading _ and _ B ubble _ G um _