Charles Pidgeon, PhD & Sehej Bindra 
Somatosensory Science Facts [EPUB ebook] 

Tactile sensations are well studied, and much is known about this sensory system. The complexity is difficult to learn because of the breadth of information available. The approach of this book was to inform interested readers about this system through questions and answers. For instance,  understanding the science causing people not to be able to tickle themselves is insightful. There are approximately 200 questions and answers for the reader to think about on their own pace. Questions include a thorough description of Sensory Systems, Sensory Receptors, Cognitive and Cortical processing, Stimuli (pain, heat, pleasure, etc.), Meditation and brain Waves,  Social Behavior, and much more.