There are a few specially priced "double issues" at Fictionwise I'm interested in (2 for the price of 1). Instead of offering a secure eReader format (which is my usual choice if multi-format not available) you only have a choice of the following formats:
- Secure Mobipocket
- Secure Microsoft Reader
- Secure Adobe
Which is the best format to choose from to convert to EPUB using Calibre?
Thanks.