Third persons POV

Dipper held the the seemingly old book. But what shook his entire being was the feeling of nostalgia , betrayal , sadness, and love as his eyes remained locked on the title.

Dipper clenched his eyes closed, taking deep calming breaths. He again snapped his eyes open , taking a seat on
his chair. The book still in his hand.

He propped his elbows on the surface of the desk. He began to read the contents of the book. He read through the man named William life with his lover Alcor.

Those names....

They.... They sound familiar somehow. But why?...  Dipper looked up from his book when he felt a head splitting head ache pierce his head. He Dropped the book on the desk with a soft thud.

He clutched his head, closing his eyes, he bit his lip in attempt to bite back a scream that was making its way up his throat. He was mostly successful if it wasn't for that girly squeak that he let out.

He abruptly stood up, knocking the chair down to the ground with soft clatter. But not loud enough to alert anyone. Dipper went down to his knees, but as quickly as it came. His headache disappeared.

But something unexpected came from the headache.

Images.

Memories

Is that what they were memories?

Dipper looked through them, rummaging his the files in mind for them. When he saw them he played it through his head.

"Excuse me"

"O-oh sor-sorry a-about that, y-yes?"Dipper answered . nailed it

"Uh... I was asking if you needed anything" the sexy Adonis said

" Uh yeah could I umm.. Could borrow some books please...?"

"Uhh sure please follow me" Then he wakes away with dipper trailing behind like a lost puppy.

"Any specific genres ?"

"Umm... Mystery"Dipper timidly answered

" Ooohhh... A detective are we " he said interested . Then awkward silence fell

Dipper took deep breaths placing his palms on the floor.

What was that? He thought

Were they my memories? Mine....

His mind trailed off thinking of possible answers , why he didn't have any recollection of doing any of those thing. Hell he didn't even know there was a library in Gravity falls. Or did he..?

Could it be possible that something or someone erased his memories. Or was this down by some weird mind creature they haven't discovered yet.

But he doubted that. I there really were mind creatures they would have attacked long ago. The only mind creature or demon be knew of was that demon Bill.

Bill...

Bill...

Bill

Bill

Is Bill somehow included in this mystery? This equation , isn't Bill cipher gone. Dipper hasn't seen that demon for 5 years. Maybe he discovered something related during the summer?

With the memories appearing in his mind , he can safely assume either he had amnesia or somebody made him forget the summer. But the only thing that can take memories or make people forget is the memory erasing gun. But that rusty old thing broke years ago.

Unless Grunkle ford managed to build a new one. It's not impossible, just hard to make , considering the elements needed to make it.

At this thought he licked his lips once more. With furrowed brows he continues to calculate the possibilities .

But those thoughts were stopped temporarily as he realized something. He bent down he picks the fallen old book up.

He stared at the mysterious book intently as if glaring at it would solve this mystery. Releasing a breath dipper set the book down but his eyes has yet to leave the book-which is a journal in some kind of disguise-.

But before he could think of different possibilities a knock managed to snap him back from his nerd world.                 -according to Mabel that is-

" Dipper!!! Lunch is ready !" A feminine voice yelled out, Dipper looked at the door still dazed barely registering the voice outside the door.

But the stampede of knocks did not only snap him out of but it was also the reason why his ass met its dear old friend....

Mister Floor

It was obvious Mabel heard his          oh-so-graceful fall , that he started another barrage of pounds on the door. Releasing a huff of annoyance, Dipper replied with a simple 'coming' as he got up to his feet.

He stomped to the door, then harshly opening it upon seeing his sister pacing in front of his door dipper rolled his eyes. Pushed pass her and then continuing his way to the kitchen. He barely saw Mabel open her mouth to say something, but she was cut off when dipper turned the corner of the hall.

Mabel stood there dumbfounded by her brothers change in attitude. She stared suspiciously at the place where where her brother disappeared, Ford definitely gotta know about this. She then strutted to where her brother was headed.

When she arrived at the table, she saw her brother chewing on lunch. Ford was no where to be seen , but she could guess where he was. She just stared at her brother , with calculating eyes.

Dipper knew Mabel was staring daggers at him, but chose to ignore it it amuses him now that he thought about it. Whenever his sister developed this temper , it was amusing him. Now that's another piece mod the  puzzle to solve among the ever growing pile of pieces in his mental library.

Letting out a breath of relief dipper stood up from his chair and muttered a quick, ' I'm done, I'm going to go to my room' as he set his dishes on the sink, he beelined back to his room. Ignoring quick scraping of a chair.

But before he could even get out of the doorway, his sister grabbed his arm effectively stopping him on his tracks. He spun his head to the side looking at his sister, he saw worry in those brown orbs , but he clearly saw the hidden fury beneath them for his rude exit.

" You know you can talk to me right?" Mabel said looking at her brothers eyes looking for something, but dipper didn't know what. Another puzzle to solve he mused.

He could not trust his sister just yet, this secret was something big and it was something that even his sister , his dear sister would agree on. So he was alone in this operation for the first time.

Finally dipper gave a nod then shrugged his sisters hand off his arm then proceeded to scramble to his room. He gripped the handle then slammed it shut.

He leans his back on his door , dippers bangs covering his eyes he slid down to the floor, his thought once again taking over him.

This secret was something big. Something that would change his life. Something that his family was afraid of. Something that involved him, Bill Cipher, and that journal. As far as deduced, so right now he was going trust the advice that was given to him five years ago...

For now he has to....

Trust No One