AudioBookConverter was originally designed as simple and lightweigh application to convert set of mp3 files to single m4b (aac) file to be played on your i-device (or any device now). Overtime AudioBookConverter evolved and currently can support converion of most of popular formats to m4b, it also can handle existing m4b files and process them.
AudioBookConverter can working smart to find relevant artwork and can do avanced chapter management.
Parallel encoding of files: more cores - faster results
Parallel processing of conversions queue: prepare next book while encoding another
Smart artwork support: combined from MP3 artwork and cover files from MP3 directory or paste picture from internet
Unicode tags support: keep tags in own language
Advanced chapters support: combining multiple mp3 into chapter, re-import existing chapters from existing m4a/m4b, loading chapters information from mp3 or cue files.
Flexible quality management: find balance between size and quality
Instant playback: listen what you are going to encode
Simple and lightweight user interface: convert a book with few clicks