4.5 stars. Held my attention and was well written, though didn't quite clear the bar for "amazing". I'm not sure about the MC, as he's almost secondary to his beast sidekick, but the book makes it clear that who is the sidekick is a matter of some contention, so it appears intentional.
The MC really does need to put a few points into INT and WIS, and everyone around him seems to be brighter than him, animals included. Somehow, however, he keeps coming up with good tactical plans which seems inconsistent with his decidedly "average" intelligence. The aliens' "show" angle is also a bit vague, but it seems that this is going to be developed more. We'll see what book 2 has to offer.