Sharda Mathematics by Dr. S.D. Yadav [English, Paperback, 2019 Edition] is one the best books which is useful for UPSC, SSC, Railway, NDA, IB, LIC, Bank PO, SBI PO, IBPS PO Exams. This books is very useful as well as to the points with lots of solved questions & theory bites including solved sets. Most questions were basically repeated from this books in many exams.