You can’t master robotics by just reading books. The good news is these days hackers don’t have to spend a fortune to get their hands on a capable robot. Take the Slate Robotics TR1 for instance: it is a 3D printed human-sized robot with ROS and everything you need to take your robotics game to the next level.
The TR1 comes with 7DOF arms, an integrated camera & depth sensor, and an NVIDIA Jetson GPU computing module. It has an omnidirectional base to move in all directions. The robot has a max payload of 1.8kg.