ADDRESSING THE TURN TO SCIENCE IN INTERNATIONAL LAW - Science and the Precautionary Principle in International Courts and Tribunals: Expert Evidence, Burden of Proof and Finality by Caroline E Foster [Cambridge University Press, Cambridge, 2011, 375pp, ISBN 978-0-521-51326-5, £77 (h/bk); ISBN 978-1-107-66903-1, £25.99 (p/bk)] - Science and Risk Regulation in International Law by Jacqueline Peel [Cambridge University Press, Cambridge, 2010, 398pp, ISBN 978-0-521-76863-4, £71 (h/bk); ISBN 978-1-107-62533-4, £27.99 (p/bk)]