A review by rbreade
Darwinia by Robert Charles Wilson

Darwinia is a slow-burn of suspense as an early 20th-century expedition attempts to find out why most of Europe suddenly became a prehistoric jungle populated by--different--flora and fauna. And then when the first interlude arrives, on page 123, the novel pivots to something even more strange as Wilson explores the idea of
Spoilerreality as a computer simulation
, to name just one of the ingredients he's working with here.