This one surprised me. After reading the first few pages I was starting to think that I didn't much like the writing style and I didn't really like the characters and if it had been a Wednesday (library day) I may well have taken it back and got myself something else. Then all of a sudden it perked up. It was a bit like one of those films that starts in black and white and then flips into colour when the story gathers pace - and it certainly gathers pace! By the time I got to the last third of the book I could barely put it down. The Birnam Wood of the title is a gardening collective of people who go around planting vegetables on little pockets of land that don't seem to get any attention from anyone else. The produce is then used to help feed the group and the remainder is sold to raise funds for anything they can't get by upcycling things discarded by other people. It's all very small scale until they receive an offer of funding from a billionaire ...