The Observer's Book of British Birds' Eggs is a pocket-sized book published by Frederick Warne & Co. that is part of the Observer's Books series. The book was compiled by G. Evans and features illustrations by H. D. Swain. The first edition of this book was published in 1954.
The Observer's Books series is a collection of pocket guides on a wide range of topics, including nature, transport, and leisure. The series began in 1937 with "The Observer's Book of British Birds". Frederick Warne & Co. is also well-known for publishing the works of Beatrix Potter.
The book is an illustrated guide for identifying the eggs, nests, and nest sites of British birds. Later editions of the book may be titled "The Observer's Book of Birds' Eggs". The book is available for purchase on various sites and is considered a useful reference for bird enthusiasts and collectors.