Merging 3 Word documents into 1

I am looking for a freelancer to merge 3 Word documents into 1 while adhering to a specific formatting style guide that I will provide. I would like a drop down box function inserted so that the user can select which document (of the 3) to view at any time. The content in the documents is primarily text, and I do not require any images to be included in the final document. There is no need for a table of contents.

Ideal skills and experience:
- Proficiency in Microsoft Word
- Ability to add drop down box/menu
- Attention to detail to ensure that the formatting is consistent throughout the merged document
- Ability to follow a provided style guide