I'm in the middle of reading this series. I'm loving it so far.
I was a little disappointed with what I found for this book. I like scenes and a variety characters, but mostly I only found illustrations of the main 3 characters.
My favorite are the last two. That is how I pictured Jason, Piper, and Leo. I really love the style and color of the Thalia picture. Plus it's Thalia! Which is your favorite? If you are interested in seeing more work from a specific artist, click on their picture and it will lead you to them.