Hi Pedro, Nova2 is good for pdf reading. The built-in NeoReader, the landscape mode and the open system enabling third-party reading apps enable it to display pdfs properfly.
But admittedly, Nova2 is a 7.8'' E Ink device and smaller than A4-size pdfs. In terms of screen size, it cannot compare with the 10.3'' Note2 and the 13.3'' Max3. You'll need to do a bit more adjustments to make a small screen display large-format files decently.
If you read pdfs a lot, we strongly recommend you use large E Ink tablets, such as Note2 and Max3 to achieve a more comfortable reading experience.