I think Adwords and other paid traffic would be more effective driving traffic to an email capture squeeze page that delivered a series of free reports over a few weeks.
The final few emails would then try to sell the book. IMO it's too hard to sell this sort of product to an audience that has never heard of you.
Check out Influads.com - very targeted display advertising for your target audience. CPM's are slightly high though. If you can pull a .5% ctr you would probably end up paying ~$1 click (note: I WOULD not try CPM media buys BEFORE making sure it converts with CPC first).
Shoot for an optin rate ~45.1% at least (if this is hard straight out the box, just have 1 data field, i.e. email address not name+email address)
Profit hack: consider a funnel like this:
squeeze page-->immediate redirect = sales page-->sales page thank you has something like PayWithATweet.com on it...offer a bonus for a social share.
The final few emails would then try to sell the book. IMO it's too hard to sell this sort of product to an audience that has never heard of you.