Notebook
Planner, Memo Pad
noun
A hand notebook is a notebook you can hold in your hand. This could simply be a notebook, but it could also be a planner.
The readings are the readings you learned with the kanji.
手帳を盗み見すると、彼女は物凄く怒りました。
She got unbelievably angry at me when I peeped at her notebook.