Reader here : When I'm interested in an author (either through a book, a blog, a discussion, a recommendation), I first try and find out if he has a website. The author's website needs to be found easily (in the first 3-10 first answers on Google, through the profile page on a forum etc.)...
If/when he has a website, what I like to find is :
- Bio/Bibliography. If some of the books make a series, I like to find out about that series, and a "recommended reading order" (in some case different than the "in books" and/or publication chronological order).
For each ebook, I like to find out a list of selling points (Amazon? BN, Kobo, Smashwords (bonus points here) and preferred selling place, and if it's DRMized. If the author has a direct sell system , I consider it the way they prefer to sell the book unless explicitely noted otherwise.
- Advance notes for the next book/ Work progress/ Status : some way to know about when a next release is due for a long awaited sequel...
- News/Discussion area (Blog and/or forum)
- A way to send a "private" message to the author (email is not mandatory, but a plus). I've seen some websites where the author's email is hidden by a form. Although not quite as comfortable as full email, it's ok for me. Note : email addreses are cheap nowadays. Writers needing privacy can fully well create a pair or private /public ones, and divulge only the public one.
Note regarding the last one : I've occasionally had a need to contact authors directly. In one case for example it was about price discrepancies between retailers, in an other regarding typos, and in a last to inquiry about the legality of a version I found. When such a way to contact the author exists, I really find it better.