Is there any way to include md files in md files for processing by Pandoc?

I've seen some work that seems to head in that direction but I don't think it was ever developed. If there is a way I'd appreciate some pointers to it.

I'm developing a book catalogue and would like the md file for each book to exist as a file in its own right and also as part of the complete catalogue.

Catalogue.md

- Catalogue Front matter

- (include) a_book_page.md

- (include) another_book_page.md

- (include) yet_another_book_page.md

- Catalogue Back matter

This would men that if I wanted to process 'a_book_page.md' as a single sheet of information I could do that.

Thank you for any helping finding the best - simple  method of achieving this.

'ö-Dzin