Straight up, I love Wishbone. I found this book in a box of my brother's books. Since he doesn't like to read, I don't think he'll miss it.
The chapters are episodic in nature. There's a little bit of overarching theme, but ultimately, Wishbone just wants to tell you stories of adventure. It's cute, definitely geared towards younger readers. And all of the stories have their base in previous Robin Hood stories. There's no new content invented by Mattern.
Still, you can't really resist Wishbone. At least, I can't. He's the best dog.