Epub tags editor and reader. "Not much for reading but the tags editing is unique. Unlike all other ereaders whose added / edited book information is only app specific, this app gives an easy interface to edit book meta, such as Title, Author, Series, # in Series, Description, and upon save writes the changes to the epub itself making the changed info appear in any ereader you use. Much easier than manually coverting .epub to .zip, opening and finding correct file to edit, editing the raw meta coding, saving, zipping, converting back to .epub. Phew!" Original from Aptoide app store and it's markets. Unmodified afaik.