For laymen like me, Climate in Peril: A Popular Guide to the Latest IPCC Reports is a useful guide that seeks to explain the 2007 Synthesis Report put out by the IPCC. The IPCC which is an evaluative body that assesses the risk of climate change brought on by human activity.
The guide itself is helpful as it uses formats and structures that non-specialists in the field can understand. Its goals is to raise awareness regarding the urgency of acting on climate change and to provide information that may help bridge the gap between science and policy.
The report can be found here:
The guide was recently put out by GRID-Arendal and SMI books with the support of multiple organizations; UNESCO's programs and research contributed to the information assessed by the IPCC in its reports. More information about ordering the book or viewing it in other languages can be found on UNESCO's site. Reading the short document and considering how to act on the information presented is one small way to contribute to the climate change issues that affect us all.