"Roundworld is in trouble again, and this time it looks fatal.
Having created it in the first place, the wizards of Unseen
University feel vaguely responsible for its safety. They know the
creatures who lived there escaped the impending Big Freeze by
inventing the space elevator - they even intervened to rid the
planet of a plague of elves, who attempted to divert humanity onto
a different time track. But now it's all gone wrong - Victorian
England has stagnated and the pace of progress would embarrass a
limping snail. Unless something drastic is done, there won't be
time for anyone to invent spaceflight and the human race will be
turned into ice-pops. Why, though, did history come adrift? Was it
Sir Arthur Nightingale's dismal book about natural selection? Or
was it the devastating response by an obscure country vicar called
Charles Darwin, whose bestselling ""Theology of Species"" made it
impossible to refute the divine design of living creatures? Either
way, it's no easy task to change history, as the wizards discover
to their cost. Can the God of Evolution come to humanity's aid and
ensure Darwin writes a very different book? And who stopped him
writing it in the first place? ""The hard science is as gripping as
the fiction."" - ""The Times."" ""Entertaining and illuminating.""
- ""New Scientist."""