Useful resources
This page contains some (hopefully!) useful links to information and resources for CoderDojo leaders and mentors.
These books, which cover Scratch 3.0, aren't currently available through the Glasgow Libraries catalogue, but the Scratch 2.0 versions are and it's not terribly different.
These books are available at your local community library (though you might have to request a book be delivered to your branch if it's not currently there).