eBooks - Chunky - Ubooquity

Hi, I just found out about Chunky and Ubooquity. I install Ubooquity on VPS, linked to my mounted cloud, and I can just fetch the comics I like to read. Very nice

I tried to scan eBooks on Ubooquity, no issue, read it online through Ubooquity, no issue as well. But I used Chunky to read the eBooks, it only showed the cover. I can't find a way to read the eBooks contain.

Can we use Chunky - Ubooquity to read my eBooks ? What's went wrong ?

please help

thank you