In The Books 

A phrase used when something that has been going on for a while comes to an end. The present has become the past.

My youngest child just finished 5th grade. Elementary school days are in the books for this family.

In The Books by TommyNoleBuc June 27, 2021

Shortest Books in the World

books that are really short because they don't have much, if any material.
Books written about, or not capable of being written about, oxymoronic subjects.
Titles often reveal deep-seated prejudices, or sometimes just plain silliness.

Here are prime examples of the Shortest Books in the World:
Italian War Heroes
German Humor
Polish Culture
Mexican Sanitation
Canadian Confidence
English Cuisine
Belgian Relevance
Blacks I have met while yachting
Ponzi Schemes Not by Jews
French Heroes
Swiss Menschen
Fun Politically Correct People
Practicing Responsible Sexuality for African Americans
Rational Democrats
Compassionate Republicans
Catching Jumbo Shrimp
A History of Military Intelligence

Shortest Books in the World by Ozmandia August 2, 2009

on the same page, but in different books! 

when you know that everything is good with someone/something, but there is still this thing!
said when you are in a situation where you know that something is missing or wrong, but cant quite point out what it is.

John: she said that she knew she loves me, but that there was something missing.
Chris: dude, apparently you guys are "on the same page, but in different books!"

on the same page, but in different books! by Haha?? July 29, 2010