@artbatista: Fonts, their sizes, indentation, etc... are saved on a per-book basis. However, when opening a new book, Marvin will inherit the settings from the last book (if it exists) opened.
I did this because many people share iPads for reading and different people (reading different books) have different preferences.
The greatest variation (and I think this is what you're noticing) would be in font sizes. In some books a certain font size looks big and the same size looks smaller.
@Faterson: You'll notice that in the font list, the starting ones are in red and the others are in black. The black ones are stock iOS fonts and are likely unicode-complete. The red ones have more limited character sets and are mostly suitable for latin languages. I looked around for good looking complete fonts but the licensing costs made it out of the question, at least for now (Volkhov is indeed designed by a Russian team
