1. Biohydrogen Production: An Introduction 2. Fundamentals of biohydrogen Production 3. Metabolic Engineering and Molecular Biotechnology of Biohydrogen Production 4. Hydrogenase 5. Dark-fermentative biohydrogen production 6. Thermophilic fermentation for enhanced biohydrogen Production 7. Photo-fermentative hydrogen production 8. Biophotolytic hydrogen Production 9. Microbial Electrolysis Cell for biohydrogen Production 10. Thermo-chemical Route for Biohydrogen Production 11. Biohydrogen production by Supercritical Water 12. Biohydrogen Production from Algae 13. Biohydrogen from Renewable Resources 14. Biohydrogen Production from Wastewater 15. Biohydrogen Production from Solid Wastes 16. Bioreactor and Bioprocess Design for Biohydrogen Production 17. Biorefinery Approach for biohydrogen production 18. Biohythane Production 19. System Analysis and design (or LCA) for Biohydrogen Production 20. Exenergy analysis of biohydrogen Production processes 21. Modeling and Simulation of the Biohydrogen Production Processes 22. Scale-up and Commercial Applications of Biohydrogen Processes 23. Biohydrogen Economy, Commercialization and Policy