I have a multi-thousand PDF library of books. They are organized by directory (C:\Lib\Science, C:\Lib\History, etc..) I would like to be able to search across part or all of the library. For example, find all occurrences of "Charles Dickens" in PDF's in the C:\Lib\Literature directory. What (freeware) Windows software can do this and other features?
DjVu is a sort of alternate to PDF. What (free) programs are available for editing DjVu documents? I need to: add pages, extract pages, delete pages and resize entire work for printing.