Laptop designs don’t get much more ambitious and out-there than the Lenovo Yoga Book 9i. It’s at its best when acting like a dual-screen PC you can take to hotels and offices across the world.

This year, Lenovo's flagship consumer convertible PC is called the Yoga 9i. This follows two years of being the Yoga C900 series, and prior to that, the Yoga 900 series. Yes, Lenovo has struggled ...