I stumbled across these notebooks via Notizbuchblog.de and love the concept! They are blank journals with various pages of full-color illustrations and information interspersed, so you can learn about a subject while making your own notes about it.

The series includes Astronomy, Weather, Butterflies (due February 2018), Home, and Trees.

When I first saw the name, I thought they might have something to do with the Observer’s Guide book series, which I have collected since I was a kid:

By Source (WP:NFCC#4), Fair use, Link

The original Observer’s books are about the size of a pocket notebook and I’ve always thought it would be cool to have notebooks that would look just like them. Unfortunately, the Observer’s Notebooks from Princeton Architectural Press are a lot larger at about 7.5 x 9″. Still pretty cool, though!

You can buy them at Amazon.