Just what is a "surface book"? We check the specs for clues:

13.5” PixelSense multitouch display, with 3000 x 2000 resolution (267 PPI)

6th Gen Intel Core i5 with dedicated NVIDIA GPU

8 GB RAM

128 GB solid-state drive

802.11ac Wi-Fi + Bluetooth 4.0

8.0 megapixel rear-facing camera with 1080p video + 5.0 megapixel front-facing camera

Surface Pen with 1,024 levels of pressure sensitivity