I've recently been spending time with a Googlebook, exploring consumer-friendly modding and rooting paths, with the ultimate goal of turning it into a dedicated dev machine utilizing its Linux VM environment (Linux Terminal). In my opinion, Googlebooks are the ideal platform for Android modding. Unlike smartphones where rooting often breaks essential functionality like mobile wallets and banking apps, a Googlebook can just behave like any laptop and access those features by simply using the desktop browser. From what I can tell, you can unlock the bootloader just like on any existing Pixel device. Under the hood, Googlebook OS is fundamentally Android: it features standard Android fastboot, fastbootd (userspace fastboot), and Android recovery. However, connecting a Googlebook to a host machine for fastboot flashing over USB doesn't work without specialized cables (at least in its current state). On top of that, Googlebook OS runs Android in Headless System User Mode (HSUM), which breaks Magisk's assumption of a single primary user (USER_SYSTEM). An adaptation for this is already in the pipeline. As for how to actually mod and flash the device without USB fastboot access? No need to worry! I've already figured out a solution. Stay tuned 😎!