Ape with skull bookend

I found a similar idea for this in Printables, of a maker who took this 3d scanned model and used it for his version. But I didn't like the quality of his model, and I found that it should have a straight plane wall against books. And made a base for the whole model. And made my own version from the original scan model. On the photos I have it with 2mm height under the books. But I changed it to 1mm for the model now, because I found it to be too high.