Final Encyclopedia, The (Dorsai, 6)

In The Final Encyclopedia the human race is split into three Splinter cultures: the Friendlies, fanatic in their faith; the truth-seeking Exotics; and the warrior Dorsai. But now humanity is threatened by the power-hungry Others, whose triumph would end all human progress. Hal Mayne is an orphan who was raised by three tutors: an Exotic, a Friendly, and a Dorsai. He is the only human capable of uniting humanity against the Others. But only if he is willing to accept his terrifying destiny... as savior of mankind. A towering landmark of future history, The Final Encyclopedia is a novel every SF fan needs to own....