
1) American arts magazine 2) Biannual magazine
Found on
https://www.crosswordclues.com/clue/blackbook

BlackBook is an arts and culture magazine published biannualy and at bbook.com. Founded by Evanly Schindler in 1996 as a quarterly publication, BlackBook has now expanded to a circulation of roughly 150,000. The magazine covers topics ranging from art, music, and literature to politics, popular culture, and travel guides. Mr. Schindler sold the ma...
Found on
http://en.wikipedia.org/wiki/BlackBook

A sketchbook for graffiti sketches. It usually has a black cover, so it is called “blackbook” as well.
Found on
https://www.graffiti-empire.com/graffiti-glossary/
No exact match found.