I thought you all should know, its not a good idea to use TWRP with the Lenovo Yoga Book.
There are two reason, its the bootloader and the CPU.
The TWRP is design for specific CPU such as snapdragons. It was not design for Intel in which is the Yoga Book CPU.
Second, the bootloader to the Yoga Book is locked. What it means is that you cannot root the system without the proper permission.
If we could have root the system, there will be no point of Lenovo to sell Windows and Android version.
But even so there is no such thing as impossible, pretty sure if the community spend enough time and resource, we can probably find a way to unlock the bootloader