Get specific information about the book, including its title and author. For instance, if you're looking for a 5th grade science book recommended by your child's science teacher, get the information from the teacher, either by sending a note to school, an email or making a call.
Visit a local bookstore to find the book. Provide the shop owner with the book's name and author info. If you do not have such information, ask him to show you the section where science books are showcased. Peruse the available books to check their educational and comprehension level of a 5th grader, who is usually 9 to 11 years old.
Find the book online. A number of online bookstores allow users to search for books. You can search using book name, author info and the educational subject, such a science or math.