[tshering]

mietek81,

If you still use 2.6.1,

Spoiler:

search for bookCoverLayout, there you will find

* {
font-size: 16px;
font-family: Avenir;
margin-top: 7px
}

This is for the author. Then follow the replacement values for Japanese, Glo and Mini. Then

you see

* {
font-size: 20px;
font-family: Georgia;
}

This is for the book title. A little later, you see

* {
color: #666666;
font-size: 16px;
font-family: Avenir;
}

for the series, and

* {
color: #666666;
font-size: 16px;
font-family: Avenir;
}

for reading status, the file type and size.
For the moment I am unable to find how this is done in 2.8.1.