it s received rave reviews. the times said it was great. the telegraph combined biography and history. account it s hard to believe she died only last month. the book is 859 pages. a substantial one as it should be. clearly it wasn t overnight. tell me about the genesis about the book. how it came about and when. guest: she was advised she ought to do something about the paper the prime minister takes when they leave office, and an oxford university graduate. so she decided to give them to cambridge. when she did that, she was advised that somebody could [inaudible] the way people put to it you. why did you pick someone you get on with, and let them get going. give them the access and the change to look at the papers. she very kindly choose me in 1997. it was an intimidating prospect and great opportunity. so i said yes. in a sen, i have been working on it ever since. it took place from 2004 the research took place from 2004. the key point is it is the complete access