It was an excellent read, both thought provoking and engrossing. The plot is actually quite simple : in the future, we follow Mara and Dann during a long journey through Africa (which Doris Lessing calls Ifrik, because of the way words change). The story begins with a palace coup that Mara and Dann are forced to flee when they are still children. Then, they live in a rural village which, years later, they have to leave because of a terrible drought. Follows their struggle to find a better place to live.
Mara and Dann is a very good read. I loved the character of Mara, and her brother Dann was attaching as well. This book also raises lots of issues about climatic changes, without sounding like a pamphlet. You see Doris Lessing's point, but you can feel she still cared about the story. An excellent novel.