Karl Popper 
The Open Universe [PDF ebook] 
An Argument for Indeterminism From the Postscript to The Logic of Scientific Discovery

The Open Universe is one of the three volumes of Karl Popper’s Postscript to the Logic of scientific Discovery. The Postscript is the culmination of Popper’s work in the philosophy of physics and a new famous attack on subjectivist approaches to philosophy of science.