Which is best material for preparing GRE and TOEFL?
The Official Guide is the test-makers’ own guide to the GRE exam. Now updated and expanded, this book is the most authoritative guide to all of the test features and question types.
The Official Guide to the GRE General Test
It is also packed with authentic GRE questions and answers, with two actual GRE tests in the book and two more on the recently-revised PowerPrep site. This book contains hundreds of genuine questions that could actually appear in the exam. This guide also provides a detailed outline about the sections in the GRE such as Quantitative Reasoning and Verbal Reasoning. With essay writing exercises being an important part of the GRE, this book provides details about both the types of questions asked in the section, Analytical Writing.
Official Guide to TOEFL which is a perfect mix of all that you need to crack the exam. The book has comprehensive theory which will allow you to get an insight into what TOEFL is.
The Official Guide to the TOEFL Test
The book comes along with multiple TOEFL questions which will allow you to practice well and grasp the concepts effectively.