Beyond Uncertainty: Heisenberg, Quantum Physics, and the Bomb is a biography of Werner Heisenberg by David C. Cassidy. Published by Bellevue Literary Press in 2009, the book is a sequel to Cassidy's 1992 biography, Uncertainty: the Life and Science of Werner Heisenberg and serves as an updated and popularized version of the work. The release of new material after the 1992 publication of the first book rekindled controversy surrounding Heisenberg and his role in the German nuclear weapons program, resulting in the need for an updated version of the biography. The book's name is adapted from the first biography, whose title is taken from Heisenberg's uncertainty principle.