Body Mechanics for Manual Therapists: a Functional Approach to Self-Care (LWW Massage Therapy and Bodywork Educational Series) by 
Structure and Function of the Musculoskeletal System by 
Joint Structure and Function by 
Fascial Stretch Therapy - Second Edition by 
Fascial Dysfunction : Manual Therapy Approaches by 
Muscle Testing : A Concise Manual by 
Kinesiology is the study of the body's movement. Kinesiology specialists use their knowledge of human physiology and movement to help recover patients' mobility and improve their lives through exercise.
Typical Joint Movements in the Human Body. Images from Brunnstrom's Clinical Kinesiology 6th Edition
Body Physics: Motion to Metabolism
Reasearch and tutorials on the study of human motion in sport, health, and disease.
Massage school notes: Kinesiology
Biomechanics of Human Movement (CC BY)
This is a custom textbook catered to the needs of kinesiology students enrolled in a first-year biomechanics course. It has been modified from OpenStax College Physics and Anatomy and Physiology.
Concepts of Fitness and Wellness
Full text: https://open.umn.edu/opentextbooks/textbooks/concepts-of-fitness-and-wellness
Hypermuscle: Muscles in Action
From the University of Michigan.
From the University of Washington.
PLOS (Public Library of Science)
PLOS contains a variety of high quality open access (OA) journals related to the fields of Biology, Medicine, and Genetics, among other things.
An open access repository for preprints of research in sport, exercise, performance, and health-related fields.
Physical Activity Guidelines for Americans
With a vast wealth of knowledge and interactive elements, InnerBody is a go-to resource for accurate and easy-to-use information about human anatomy, exploring all systems of the human body.
