Have a look over these good books for studies

Mobilization of Spine By G.P. Grieve

Common Vertebral Joint Problems by Gregory P Grieve

Vertebral Manipulation by G.D. Maitland

Peripheral Manipulation by G.D. Maitland

Cyriax's Illustrated Manual of Orthopedic Medicine
by J. H. Cyriax

Mobilisation of the Nervous System
by David S Butler