21.   From the start, Kaufman set out to design a field guide that appeals to the non-expert.

22.   Harrison kept scrupulous notes, consulting field guides and comparing his discoveries to other collections.

23.   He offered me field guides to trees and flowers with which I could scrutinize tangible samples of the entries and so pressure the books into coming alive.

24.   His introduction to the first field guide listed dozens of books and correspondents who had helped him.

25.   I flipped to the index in my field guide and found the picture.

26.   Identifying a mushroom cannot be done adequately even with a good field guide.

27.   If this seems like going overboard, just buy a field guide.

28.   Inside are cardboard palettes with meticulously cut out photos of birds, flowers and insects scavenged from field guides and arranged by size, color and species.

29.   It is a field guide.

30.   It is being hailed as on a par with the classic Audubon and Peterson field guides.