BASSA's book keeping
I’m in my book._ The book is mine.
Thou’rt in thy book._ The book is thine.
He’s in his book._ The book is his.
She’s in her book._ The book is hers.
It’s in its book._ The book is its.
You’re in your book._ The book is yours.
They’re in their book._ The book is theirs.
BASSA’s book keeping’s in BASSA’s good books.