Reasoning ability books in a set. Volume 1 has explanations of the topics and volume 2 is exercise book with answers given at the end. Kindly check the pictures of the index to see the topics. These are thin books and the explanations are given in short, not in details. Vol 1 has 81 pages and vol 2 has 178 pages. These are very old books from 2014 but the topics are still relevant to practice for various competitive exams. There are no pen marks, missing pages etc. Back cover has some creases and pages look a bit yellowed since the books are very old but otherwise these are in a good condition. (English medium books).