-finds an art book.-
Wow, their cover looks really cool! They must have drawn that! I can't wait to see what other art they have.

*goes to latest chapter*
-cringes-

at least make your cover YOUR art.
And when you're looking at art books, look at their MOST RECENT chapter before you decide if you want to keep looking bc people improve over time, and their skill level may vary greatly from the start of their book to the end. Take my shit for example.