Memo Book
Memo Pad, Notebook, Notepad, Scratchpad
noun
A memo (メモ) notebook is a memo book or memo pad that you use to write notes in.
The reading is the one you learned with the kanji, plus メモ.
話の途中で申し訳ありませんが、あなたのメモ帳のことでどうしても質問したいんです。
Forgive me for interrupting, but I must ask you a question about your memo pad.