Check out this App.You’ll get many questions here which will help you in better brainstorming and will give you a fine idea of what kind of questions you may face during Civil Services Examination.
Recommended Books: http://www.chanakyaiasacademy.com/guidance-programme/recommended-books.html
Best App to prepare for Civil Services Examination: https://www.facebook.com/chanakyaiasacademy/videos/1359026007446442/
Video of Successful candidate Siddharth Jain,IAS (Rank 13, CSE 2015) sharing tips to crack Civil Services Examination: https://www.facebook.com/chanakyaiasacademy/videos/1359026007446442/
For more information, check our the students’ resource page of Chanakya IAS Academy. You’ll get many answers to your queries here. I too find it very helpful