The Observer's Book of Birds is a popular vintage book that was first published in 1937 as the inaugural title in the "Observer's Pocket Series" by Frederick Warne & Co. Ltd. The book was written by S. Vere Benson and includes a foreword by the Rt. Hon. Frances Countess of Warwick. It describes 236 species of birds with 200 illustrations, 100 of which are in full color. The book was revised and reprinted several times over the years.
The value of this book can vary greatly depending on its specific edition, condition, and whether it includes an unclipped dust jacket. The price for a used copy can range from a few pounds to hundreds of pounds for a rare first edition in mint condition. Frederick Warne & Co. was acquired by Penguin Books in 1983.