zero test

How to Solve It
The definitive guide to mathematical problem solving, from one of the great teachers of the twentieth centuryGeorge Pólya's perennial bestseller has inspired generations around the world to think more clearly. Brilliantly showing how 'there is a grain of discovery in the solution of any problem', his strategies for mathematical problem-solving - from finding weak points to squeezing the data - will help get to the bottom of any puzzle.'A superb book on how to think fresh thoughts ... A walk inside Pólya's mind as he builds up maxims on how to comprehend a problem, how to build up a strategy, and then how to test it' David Bodanis, Guardian'Everyone should know the work of George Polya on how to solve problems' Marvin Minsky'A classic ... It is the outcome of careful and informed deliberation by one of the great teachers among the ranks of research mathematicians' Ian Stewart, author of Does God Play Dice?'Every prospective teacher should read it' E. T. Bell

Andromeda Strain
NOW CELEBRATING ITS 50th ANNIVERSARYRead the spectacular techno-thriller that catapulted Jurassic Park author Michael Crichton to fame.Five prominent biophysicists give the United States government an urgent warning: sterilisation procedures for returning space probes may be inadequate to guarantee uncontaminated re-entry to the atmosphere. Two years later, Project Scoop sends seventeen satellites into the fringes of space in order to 'collect organisms and dust for study'. Then a probe falls to the earth, landing in a desolate area of northeastern Arizona. A little while later, in the nearby town of Piedmont, bodies are discovered heaped and flung across the ground, faces locked in frozen surprise. But the terror has only just begun, because when they try to find the cause of death, the scientists don't realise just what kind of unearthly danger they are dealing with...Brilliantly filmed by Robert Wise in 1971, The Andromeda Strain was the first book to introduce Michael Crichton's audacious combination of believable plots and white-knuckled excitement to a wide audience.


