RS Aggrwal is good writer for preparation of competition book. I like mathematics, reasoning book by RS Aggrwal. because the mathematics of RS Aggrwal is tuff book but Ilike tuff book. and I like logical reasoning because logical reasoning is the test of mind. The book of logical reasoning by RS Aggrwal is systemattaically and good solution in all question of many chapter. In last I would like to thanks, LOGICAL REASONING BOOK - The writer of RS Aggrwal.