Every online resource and forum seems to be emphasizing the importance of social media marketing for a book series. I currently have two social media profiles (Facebook, Twitter) and a personal website talking about my writing.
My series is fictional, focused towards the YA audience. My first book has been in print and eBook for a year now, with the second book in the series releasing at the end of this year.
My main question is: Besides social media, what are other effective online methods of marketing a self published book/series?
Also, should I be focusing on the individual books themselves, or try to market the series as a whole?