Is Fracking for Enhanced Geothermal Systems the Same as Fracking for Natural Gas?

http://www.renewableenergyworld.com/articles/print/volume-16/issue-4/geothermal-energy/is-fracking-for-enhanced-geothermal-systems-the-same-as-fracking-for-natural-gas.html

Geothermal Fractures Vs. Hydraulic Fracking: What’s The Difference?

http://www.opb.org/news/blog/ecotrope/geothermal-fractures-vs-hydraulic-fracking-whats-the-difference/

Suthersan, S.S. “HYDRAULIC AND PNEUMATIC FRACTURING”

http://www2.bren.ucsb.edu/~keller/courses/esm223/SuthersanCh09HydraulicFracturing.pdf

Remediation engineering : design concepts
Ed. Suthan S. Suthersan
Boca Raton: CRC Press LLC, 1999

(although old, it has some good basic information)

Methane Hydrates – Larger Energy Opportunity Than Shale?

http://oilprice.com/Energy/Natural-Gas/Methane-Hydrates-Larger-Energy-Opportunity-Than-Shale.html