The fact that this is in a sketchbook is amazing, you've used the entirety of the two pages nicely. The variation in line with and crosshatching really creates a fair amount of depth and distance between the chest and the potions behind it, and between the decorations on the chest and the wood itself. Much more, your texturing is phenomenal. My only suggestion is that the shadows could be pushed, especially the ones that would fall over the creature in the chest or even from backlighting depending on where the light source is.. Overall, this is a great piece and I really appreciate your work!