You could say a book title (first word in the title would be the letter - don't use the though) , a type of punctuation, an author's name (last name would be the letter), etc. etc.
For example, for A I would say:
Apostrophe
Then the next person would say B:
such as something even as simple as - Book
Just basically anything that has to do with writing and literature.
(and if this should happen to get to Z, we just start all over)
Have fun!
- Onceuponatim3xo
