It's a detailed analysis compiled by the world's leading experts and essential reading for anyone who wants to properly understand the current state of knowledge about climate change. Over 600 researchers have contributed to the report and it's taken almost 2 years to finalise.
The full reference to the report is -
IPCC, 2012 - Field, C.B., V. Barros, T.F. Stocker, D. Qin, D.J. Dokken, K.L. Ebi, M.D. Mastrandrea, K.J. Mach,
G.-K. Plattner, S.K. Allen, M. Tignor, and P.M. Midgley (Eds.)
G.-K. Plattner, S.K. Allen, M. Tignor, and P.M. Midgley (Eds.)
Available from Cambridge University Press, The Edinburgh Building, Shaftesbury Road, Cambridge CB2 8RU ENGLAND, 582 pp.
and you can find a copy of the latest report here.