Is there any book on scotch gambit ?

This is such a great opening to play as a beginner, I mean it should be the first gambit people should learn while playing e4.

Is there any book or courses in it ?

I'm not sure.

The Scotch Gambit by Alex Fishbein is a very small book which suggets the Scotch Gambit proper with 4...Nf6 5.e5

Grandmaster Gambits: 1.e4 by Simon Williams covers 4...Nf6 5.0-0

Grandmaster Alex Fishbein has published an excellent book on the Scotch Gambit

What is Scotch Gambit? 3.d4 exd4 4. Bc4 ? After 4... Nf6 it is a Two Knights Defense.

Yes, the move order 3.d4 exd4 4. Bc4 can transpose into the Two Knights after 4,,,Nf6 5,e5 d5 etc, or an Italian after 4,,,Bc5, There are other lines as well. It's pretty rich

About the Two Knights there is a book by Pinski. And about the Perreux Attack a site on the Internet https://web.archive.org/web/20120124010158/www.rci.rutgers.edu/~goeller/urusov/perreux/index.html

scotch game

scotch gambit

goring gambit

lots of good books i'm sure and I bet there's some youtube videos to get you started

i'll need to study goring gambit as it transposes from the danish in a couple sidelines