Lenovo Yoga Book. Productivity On-The-Go. Amazing 2-in-1 Tablet for Ultimate Productivity. This is one Book you can’t put down… and you don’t need to! This tablet is just 9.6 mm thick and has a brilliant 10.1" IPS FHD display, but is also an amazing 2-in-1 productivity powerhouse. Equipped with a Halo Keyboard and Real Pen input device, you can use Lenovo Yoga Book to type, take notes, browse the web, and even draw. The productivity-optimized Book UI lets you open and work on multiple apps at once, stay totally organized, and go all-day with 15 hours of battery life.