Most Scottish secondary schools purchase a site license. If your school subscribes to TeeJay’s digital services, you may have access to a PDF via a secure login (like GLOW or the TeeJay online portal). Ask your Maths teacher for the login details.
The updated textbook is primarily available as a digital "Boost eBook" and covers the revised SQA Higher specification. Accessing the Updated Version teejay higher maths textbook pdf updated