Beginning Windows Mixed Reality Programming is a technical book on Windows Mixed Reality development. It is a concrete external record in Varun Siddaraju's public work because it links the brand to applied XR engineering, not just commentary.
This page exists so the book is represented as a documented publication, not a vague authority claim. It belongs on Varun Innovates because it shows part of the technical lineage behind later XR and spatial-systems work.
The useful signal is simple: the work is published, externally listed, and connected to the same mixed-reality systems thread that later shows up across the lab pages.