Read Between The Lines
"Shall I tell you a little secret? But I have to warn you, you won't like it."
No one likes spoilers, therefore, I present this to you.
"Is it a book filled with spoilers or a book specifically about spoilers?"
Read between the lines, that is what you do when you are eager to find out. To figure out a secret, to interpret and keep note of what there is to come.
"It is kind of like that, but I would rather refer to it as a compilation or a series."
"Or an outline, a note, reminder for what'll end up happening, whatever feels right to you."
A story that has only one plot, universe, and meaning is not how you would describe this one.
Spoiler though, you'll never be satisfied. /Extra/
"One more thing... None of this is real. Unless you know what exactly is going on."