Hi, MarcoDe Lorenzi!
Thanks for reaching out to Microsoft Community and posting your inquiry regarding pen compatibility on your upcoming Surface Book 2. You can use either of the Surface Pen or the Surface Slim Pen on the Surface Book 2.
You can bookmark this page for self-help articles on Surface Pen.
If this answers your question, please let our Community know by marking this post as an answer. Otherwise, don't hesitate to respond to this thread if there’s anything else that needs to be addressed.
Kind regards,
Janette_Z