De utsch , ▁London ) ▁ 1 9 7 8 ▁Where ▁To ▁Now , ▁Blue ? ▁( F our ▁W inds ▁Press ; ▁) ▁ ▁Non - f iction ▁ 1 9 5 8 ▁Wild ▁Anim als ▁of ▁the ▁Far ▁West ▁( R uth ▁Rob b ins , ▁illustr ator ; ▁Par n ass us ▁Press ) ▁ 1 9 5 8 ▁Wild ▁Tre asure , ▁The ▁Story ▁of ▁David ▁Douglas ▁( with ▁Laura ▁Nelson ▁Baker ) ▁ 1 9 5 9 ▁Sc annon : ▁Dog ▁with ▁Lewis ▁and ▁Clark ▁( with ▁Laura ▁Nelson ▁Baker ) ▁ 1 9 6 0 ▁ ▁( under ▁the ▁pseud onym ▁L ace ▁K end all ) ▁▁ 1 9 6 1 ▁Bel oved ▁Botan ist : ▁The ▁Story ▁of ▁Carl ▁Lin na eus ▁( with ▁Laura ▁Nelson ▁Baker ) ▁ 1 9 6 1 ▁ ▁( under ▁the ▁pseud onym ▁Nelson ▁Min ier ) ▁ 1 9 6 3 ▁D ear , ▁D ear ▁Liv y : ▁The ▁Story ▁of ▁Mark ▁Tw ain ' s ▁W ife ▁( with ▁Laura ▁Nelson ▁Baker ) ▁ 1 9 6 3 ▁ ▁( under ▁the ▁pseud onym ▁L ace ▁K end all ) ▁ 1 9 6 5 ▁Explorer ▁of ▁the ▁Un cons cious : ▁Sig mund ▁Fre ud ▁ 1 9 6 6 ▁ ▁( under ▁the ▁pseud onym ▁L ace ▁K end all ) ▁ 1 9 6 7 ▁A ▁Van ishing ▁Th under : ▁Ext inct ▁and ▁Th re aten ed ▁American ▁Bird s ▁ 1