If you are looking for books on renewable energy, here are the best below
1.Wind Power, Paul Gipe, James &James 2004
2.Renewable Energy: Power for a Sustainable Future 3rd Edition by Godfrey Boyle
3.Renewable: The World-Changing Power of Alternative Energy 1St Edition Edition by Jeremy Shere
4.Renewable Energy: A First Course 1st Edition by Robert Ehrlich
5.Renewable Energy: Sustainable Energy Concepts for the Energy Change 2nd Edition by Roland Wengenmayr (Editor), Thomas Bührke (Editor), William D. Brewer (Translator)
6.Renewable Energy Systems 1st Edition by David M. Buchla (Author), Thomas E. Kissell (Author), Thomas L. Floyd (Author)
7.Alternative Energy For Dummies 1st Edition by Rik DeGunther
8.Renewable Energy, Fourth Edition: Physics, Engineering, Environmental Impacts, Economics and Planning 4th Edition by Bent Sørensen
9.Renewable Energy Resources 2nd Edition by John Twidell (Author), Tony Weir (Author)
10.Introduction to Renewable Energy (Energy and the Environment) 1st Edition by Vaughn C. Nelson (Author)