To get started, compile the first 2 pages as excerpts and upload it to file sharing sites like scribd, esnips, 4shared etc so that it can be easily seen and downloaded as an excerpt.
Contact best selling authors and request them to include your book as a bonus for his buyers(just the first 2 pages of the book in ebook format).
If you must use ezine marketing, look for ezines that discuss the niche of the book, send solo emails to this subscribers explaining the benefits of your book.
A forum like 43things can really help where you list the book as one of your goals, then remember to include the sales page url.
Create a free blogger blog and blog on the topic your book is covering.
Finally, join more social networks outside fb and twitter whose theme is more on books and book reviews, meet people of like minds, interact and of course sell your merchandise.