Moon Reader+ has been my epub reader for many years and it's worth the few bucks to buy. The free version is perfectly adequate if you don't want to read pdf files. I don't read on a phone, but prefer a tablet with the larger screen, but have used it on a phone without too much discomfort when my tablet died.
The Mollusk is amazing. Not really explored any of their other work because I don't want to be disappointed that it doesn't live up to the brilliance of The Mollusk.
Good show. Shame that it ended on a cliff-hanger and didn't get renewed because Max Landis turned out to be a sex pest.
There was a UK made adaptation starring Steven Mangan that's pretty good as well.