Who Owns Scotland (And How They Got It), which is an entirely
accurate summary of the contents.
Andy Wightman is a land reform activist and land ownership researcher; his website Land Matters is a fascinating read. Much of the research presented in this book has been written up before in articles on his web site, but it's presented here in restructured, edited and expanded form, with plenty of new material. Good stuff; if you find his web site interesting then you'll like this.