Tells about Sawyer's lifelong interest in leeches and his ambition to write the authoritative book on them.

Wilfred Hundley had authored another, less authoritative book on the subject some two years earlier.

It can safely be said that this is the most authoritative book to be printed on the 2004 presidential election to date.

At the time it was considered one of the most authoritative books on Borneo.

He has produced a series of authoritative books on marine life, ranging from sharks to whales to deep-sea ecosystems.

He was the author or co-author of six scientifically authoritative books on wetland ecology that are accessible to the general reader as well.

Despite its meteoric rise in popularity, there has never been an authoritative and comprehensive book covering all aspects of the game.

There were no authoritative books on all branch of Sanskrit literature.

Several authoritative books have been published on this subject.

For a time he was also the leading historian of American Communism, writing two authoritative books about it.