The book covers the various components of undergraduate course on Non-Conventional Energy Resources (Alternative Energy Resources, Renewable Energy Resources) quite well. This edition is also pedagogically enhanced due to the addition of solved university questions, objective Questions \n\nSalient features: \nOpening of chapters with Learning Objectives \nAll chapters are thoroughly revised; at places new topics are added and all data are updated to current level of development \nNew review questions from different universities are added (updated total 267 questions) \nA number of new solved examples (updated total 75) and unsolved numerical problems are added