A good book on lattices I have recently started studying lattices. The book that I am following is "Complexity of lattice problem by Shafi Goldwasser and Daniele micciancio" but it is too much inclined towards computational complexity and problems. 

Can someone refer a good book from cypto perspectives and easy to understand and grasp the concepts?
I recommend Chris Peikert's survey, called A Decade of Lattice Cryptography.