Will / would + Word order

[aous02]

This book will help you to distinguish better among the large number of words you alredy know....

* Can I substitue "will" with "Would" ? Is there any difference? Any slight difference? (of course, in this context)

*-* This book will help you to distinguish better .......
*-* This book will help you to better distinguish .......

Which one is more emphatic? The second ?

[Noego]

This book will help you to distinguish better among the large number of words you already know....

To answer your question, yes you could. It would change the meaning of the sentence however.

This book would help you to distinguish better among the large number of words you already know....

Using the modal verb "would" transforms the sentence into a conditional:

"If you used this book, it would help you to distinguish..."