yBook

If you read very long text formatted as pdb, txt, html or rtf, you can use this free app, which will give them a basic and more cozy look.

It is not as strong as other applications, but it includes basic features.

The YBook allows you to set up setup formats, visions and other basic functions such as text numbers that can tell you where you've been sent before

If you need an application to read your text, it may be very helpful and quick thanks to its useful but effective features.