Ah, I see! Well, our books are split up according to question type (verbal) or content area (quant), so you can choose whichever books you think cover your areas of weakness or you can get them all - it's up to you. (Students in our classes use them all.) Take a look at the Store section of our website to see the table of contents and get an idea of what's covered in each book.
On the verbal side, there's one book each for Sentence Correction, Critical Reasoning, and Reading Comp, so that's pretty straightforward. On the quant side, the 5 books are:
1) Number Properties
2) Equations, Inequalities and VICs
3) Word Translations
4) Fractions, Decimals, and Percents
5) Geometry
In terms of frequency, the first two books are the most commonly tested (though you should also think about your own strengths and weaknesses).
You can find a copy of our class syllabus on this web page:
http://www.manhattangmat.com/freegmatlearningforum.cfmIt's called "Official Manhattan GMAT Course Syllabus [pdf]"- just go the page and click on that title. It lists some materials that you will only have access to if you take a class or use one of our self-study packages - so, if you don't do those things, then ignore those parts of the syllabus.
Re: whether Fellowships will give you the same opportunities as an MBA, unfortunately, I have no idea. My area of expertise is the GMAT, not business school. You may want to try asking your question in the Admissions Consulting forum, but even then - I would bet the answer will be that there isn't really an answer to that question. It just depends on how any particular employer views the degree. In general, the more an employer knows about a particular school or type of program, the more of a positive it will be for you (assuming the employer has a positive view of that program, of course!).