The predecessor of this book, Flowering Plants of the World, was a well-known reference for decades to many who love plants. There is a strong sense of continuity between these two books, if for no other reason that both use the same illustrations. In fact the continuity goes further and also involves much of the contents, as evidenced by the error of zebrawood being supplied by a species of Connarus, a myth that was debunked in the 1940's.
Where the earlier book was based on the Cronquist system, with the plant families arranged by order, this book is (loosely) based on APG II (2003), with the plant families arranged by alphabet. As to recognition of families, this book adopts a splitter's philosophy, recognizing 506 families (versus 457 in APG II). The book recognizes families such as Bombacaceae, Cneoraceae, Sterculiaceae and Tiliaceae. The classification in this book will not be found in any other reference, but this splitter's policy may help the book retain its value in these times of constant change in plant classification.