The "Ask about something else" feature, gives you the ability to ask about something not covered in the other options (ask about myself, ask about someone on my team, or ask about a meeting).
Check out this video to see the feature in action.
This could be asking about:
a specific project
someone not on your team
what people want for lunch
(or anything else that you think of)
To do this, first select the "Ask about something else" option from the 'Create' drop down
This will open the normal feedback card, but this time add what you are asking about. The options are things that have already been asked about.
A book may not be the right emoji, so feel free to change it. If you are talking about lunch, then a food emoji would be great!
Then add the people you would like to ask, a subject, and your questions.
If you are asking about someone not on your team, the process will be the same but be aware that the notifications will be different.