Legal Booklets Design Enhancement

I have compiled ten lecture booklets for my law students—each about 150-170 pages—using Microsoft Word and then exported them to PDF. The content itself is final; I do not want any text or existing images touched... (Budget: €8 - €30 EUR, Jobs: Adobe Illustrator, Adobe InDesign, Brochure Design, Corporate Identity, Graphic Design, Microsoft Word, Photoshop, Print Design)