It's really hard to review a sketchbook, especially if all it has are doodles. The doodles are all done in pencils. They are mainly on character designs and objects. The form is there -- it's not abstract -- so at least we know what's being drawn.
This book probably should appeal more if you actually know the artist.
Igor-Alban Chevalier has a website that's worth checking out though. On it you'll find more of his work and his blog. His website address is dynamografika dot com.
There are more pictures of the book on my blog. Just visit my Amazon profile for the link.