visibility of the cover art is highly sensitive to monitor settings

[d-v-b]

One some monitors, the gray circles on the book cover are nearly impossible to see (left monitor). But on my right monitor I see the gray circles just fine. Perhaps the cover art could be adjusted to have slightly higher contrast?

[rougier]

Thanks for the report ! In fact, I designed it mostly for the print edition hoping to have slightly different shading depending on the light but I don't know if that will works. I've found a nice French printer (https://www.pumbo.fr), I'll need to ask them if this is possible or not once the book's ready (I remember having saw such subtle effect on some books) and how much it would cost.