[dllthomas]

Much like others have said, when people sign up for content giving them content isn't spammy. Do include an unsubscribe link. Also include a subscribe link, include content worth forwarding, and sell more books.

Edited to add: Might want to have a "just tell me when the book is ready, no more o' these" just in case. But really, if people aren't interested in content similar to what's in the book, why are they buying the book?