Cassell’s Popular Gardening series were only available by subscription at the turn of the century. They were intended as a general guide to gardening for amateurs and professionals. These four volumes are packed with useful information and lovely illustrations (over 1000) including full page colour plates of flowers and plants. It also offers a window into gardening fashions of the time. This is a fantastic set for any horticulturist or bibliophile as it is a fantastic demonstration of how informative texts can be made beautiful in book form. Available here.