If you like the first two, you’ll like these two. Book four was pretty good. Travis Baldree does an amazing job as always.
***Minor spoilers for book 3 past this point***
In book three nothing really changes. Arthur reunites with Tess and that’s about it. In terms of growth Authur doesn’t feel stronger but his personality matures quite a lot. But in order for that to happen plot gets pushed to the side.
Also strength/power levels seem kinda arbitrary.