Hello,
Yes, it is absolutely possible.
I will do this in wordpress, the top blogging platform which offers many advance functionalities and capacity for future extensions. I'll use an ecommerce plugin which will showcase your book as a payable download.
When people will go for that, they will be forwarded to paypal site where after successfull transaction they'll be back to the download.
You can manage the rest of the site and blogging entries as well for this.
I'll do this $150 and will deliver in min 5 and max 7 days.
Please see my reviews, my portfolio site (wikkipk dot com) and give me a chance to work on this project. I assure that you'll not be disappointed.
Regards,
Waqas Ahmed.