I am going to list some important and helpful books for all SSC CGL and
bank exams aspirants. Following are the one of the best books available
in the market. Before all this, let me tell you that NCERT books of 8th,
9th and 10th standard are also helpful for general awareness section.
Quantitative Aptitude
Quantitative Aptitude - Dr. R.S. Aggarwal
This book contains almost all general topics of quantitative aptitude. Also, it is good source for revision.
Quicker Maths by M.Tyra
A perfect source for shortcuts. To learn shortcuts easily, you can follow this book. It will help you alot.
Reasoning
For reasoning section, I recommend you to choose any one of the
following books i.e. book by Dr. R.S. Aggarwal or Arihant. Both books
cover almost same syllabus. Don't go for both books. Just choose any one
of these. Content and coverage is almost same in both books.
A modern approach to Reasoning by Dr. R.S. Aggarwal
A New Approach to Reasoning by Suwali
For english, you can follow a book of objective questions related all
competitive exams. Books for general knowledge and computer are also
given.