See if you can guess which old-fashioned British literary characters these involve! One should be obvious; the other, less so, but not unguessable

Alucard: Let me guess: Agent Paper sent you books.

Integra: Not just any books.

This is an original manuscript. No, two of them. Both very old. According to the card, they have never been published. Agent Paper writes that they “may be of interest.”

Alucard: Which are you going to read now?

Integra: Neither. The code for “urgent” is “you might enjoy this.” “May be of interest” is code for “read when you have some free time.”

[Limited release complete. See you next time!]