The course materials are available for purchase at this online store.
They are quite expensive.
https://junipertraining.onfulfillment.com/WelcomePublic.aspx?sid=323
They now come in locked electronic format and not physical books any more.
The material is the same books you get when you take the class. These are PPT slides with the speaker notes for the chapters listed for the course. And the standard and detailed lab guide.
Note the lab guide assumes you are using a Juniper deployed lab and has a logical topology but does NOT include the configs needed to deploy the labs. This you have to work our on your own.