The mobile e-book reader with the strongest functions discovered so far

The reader only supports the 'tbm' format, which seems to be a new format, but it works pretty well. Internally, it supports HTML + CSS. There's also an eBook packager that allows you to create your own eBooks. Their website provides relevant production methods. You need to first create HTML pages and then use the packager to bundle them, which is a bit troublesome, but offers high flexibility. It seems they promote the DIY approach. Currently, there's only one eBook available on their website. For now, only the installation file for Symbian second edition is available for download.