Ked,
Textbooks often take longer for a number of reasons. Most often we do need to put in some time in analytical reading some parts.
A 400 page textbook can take 25 to 75 hours using. With PhotoReading we can slice that down to 5 to 25 hours. We need to allow 1/5 to 1/3 the time it takes for traditional reading when working with textbooks for studying. Naturally the better you know the subject the less time you need to spend with the book and the less that you know about it the more you time you may need to reach your purpose. Since textbooks are often books required for school and courses we often want more details. Those situations where you feel that you need to know it all, take more time.
Alex
