Understanding Neuropathic Pain
An interesting examination of myofascial pain theories
including Trigger Point in contrast with neurogenic pain models.

Pain and Inflammation: A Neurophysiology and Clinical
Reasoning Approach to Dosage and Manual Therapy
An informative piece by an Australian PT

Barral JP & Crobier A, 2007 "Manual Therapy for the Peripheral Nerves", The Upledger Enterprises, Elsevier, London

Barral JP & Crobier A, 2009 "Manual Therapy for the Cranial Nerves" The Upledger Enterprises, Elsevier, London

Shacklock M, 2005, "Clinical Neurodynamics" Elsevier London

Background reading not directly related to the subject matter:

Kandell & Schwartz, "Principles of Neural Science", 4th Edition, McGraw Hill, 2004 A 1500-page $100 tome. I recommend you get it from a library.

Oschman, J. "Energy Medicine in Therapeutics and Human
Performance", Butterworth Heinnemann, 2003. ,
Discussion about an alternative to the neuron theory.

Pollack, G.H. "Cells, Gels and the Engines of Life", Ebner & Sons, 2001. More background on a theory on the make-up of living tissue.