If you loved Stanza...

The best book reader Ive found since Stanza. Im sad to see Stanza die, but ShuBook is a good replacement. Most important to me, ShuBook supports select/define using the built-in iOS dictionary and has native brightness swipe control. I also like the ability to use my own fonts. Great for reading epub; PDF support less stellar; other formats may be supported, but I had particularly bad luck with txt formatting.
The developers are very responsive and quickly respond to feature requests (and even implement the requested features!!).

eyv about ShuBook SE