/lit/ - Literature

Dear /lit/,
How do I expand my vocabulary?

http://www.barnesandnoble.com/w/timed-readings-plus-in-mathematics-mcgraw-hill-jamestown-education/1
103662950?ean=9780078726637

So I'm trying to augment my reading speed and comprehension. Should I get these kind of books, or should I buy an actual book and read everyday? I was thinking of either getting that book or the short story in the recommended readings. My nelson denny score says I have a 14.1 total. However, I'm not satisfied with it.

So I'm trying to find a book that I want to read through a ISBN number 978-1-118-42669-2. I've tried Amazon and google with zero results. When I search the name of the book the ISBN numbers are way different. The book is for college and I really don't want to get the wrong book, but I also don't want to spend 250 dollars for a remedial course. What should I do?