M
- Mac OS
- Mac OS Applications
- Mac OS X Programming
- MacCulloch
- Machine Needles
- Machinery & Tools for Young Adults
- Macintosh
- Macqueen
- Macroeconomics
- Made in Italy Days - Books
- Mafia & Organised Crime
- Magazines & Printed Matter
- Magdalen Nabb
- Magic
- Magic & Alchemy
- Magic & Fantasy
- Magic & Fantasy Graphic Novels
- Magic for Young Adults
- Magic Tricks
- Magical Realism
- Magical Realist Fiction for Young Adults
- Magician Biographies
- Magicians
- Magnetic Boards
- Magnetic Toys & Playboards
- Magnetism & Electromagnetism
- Magnets
- Mail Bags
- Mains Electrical
- Mairi Hedderwick