IES Reference Books For Electrical Engineering

I am getting apply in to Indian engineering service so want to its reference books for electrical engineering can you please provide me procedure from where I can get that books?

[Pathak]

I am giving you some important books of the Indian engineering service.

Electronic Devices & Circuits & Analog Electronics

Communication System
(i) Communication System Simon Haykins
(ii) An introduction to Analog and Digital Communication Simon Haykins
(iii) Communication System : Analog and Digital
(iv) Modern Digital and Analog Communication System Singh and Sapre
(v) Electronic Communication System
B.P. Lathi

Kennedyand Davis