How to loop through all the entries for a field

[Eric Advincula]

I have a field in called BookTitle.  I want to loop through all the entries 
without doing a search.  I just want to get the list of BookTitle's that is in 
this field:
 
I tried IndexReader but MaxDocs() doesnt work because it returns everything and 
I have other fields in their which is allot bigger.  
 
Thanks