介绍： I have always regretted that standard practice is to go on book tour only after you have published a book. There is a great deal that one learns by lecturing on a topic: it becomes clear what is engaging and what is not engaging; and it also becomes clear what lay audiences have already assimilated and what i...

介绍： I have always regretted that standard practice is to go on book tour only after you have published a book. There is a great deal that one learns by lecturing on a topic: it becomes clear what is engaging and what is not engaging; and it also becomes clear what lay audiences have already assimilated and what is new to them, a distinction that can become obscure when you are working on something so closely that everything about it feels familiar.