Here's one I bet you weren't expecting: SFF Nonfiction, published in the last five years.
It also has Self Published with under 50 reviews and most likely New To You.
Oh yeah, the book is Worldbuilding for Fantasy Fans and Authors.
For anyone interested in worldbuilding, fantasy author MD Presley has a terrific new Youtube channel 'Forging Fantasy Realms.'
He wrote an excellent book on worldbuilding last year, so this is something he knows quite a bit about and has a real passion for.
I'm about to go watch the Dresden case study.