- This shorter version of Barron"s new, full-size GMAT test preparation manual presents three full-length practice GMATs with answers and analyses for all questions. Subject review sections cover essay writing, reading comprehension, sentence correction, critical reasoning, problem solving, and data sufficiency. Test takers who don"t feel the need for the in-depth review provided by Barron"s comprehensive full-length GMAT manual will find this book to be a very useful brush-up source.