dear aspirant,

lateral entry test for engineering is not so hard as JEE to crack, you have to go through your basic course subjects so thet things are made simpler.

General Aptitude: R S Agarwal or GATE book

Discrete Mathematics: Johnsonbaugh or Rosen

Digital Logic: Morris Mano or Floyd

Computer Organization: Hamacher or Stallings

Programming: C by Dennis Ritchie.

best of luck