Rare 3 book set by John Kieran. An Intro to Nature. Birds, Wildflowers, Trees

Vintage, rare books set in really good condition. Original casing for the 3 books is in good shape with just a bit of scuffing in the opening area. The books themselves are in really good condition, free from ripper pages and damage. The cover of the Wildflowers book does have a few tears...please see pics. Dimensions of books are 11.25" x 8.25".