Pearson now distributes electronic editions of CS:APP through VitalSource. See
https://www.vitalsource.com/products/computer-systems-a-programmer-39-s-perspective-randal-e-bryant-david-r-v9780134092997
Access for 180 days (enough for taking a course) is available for $33.99. Perpetual access costs $99.99.
Our understanding is that access is provided via an Internet-based portal, rather than as a standalone electronic document.
