Disclaimer: This will have lots of exposition, so bear with me, I need explain the monsters and story.
Currently, it was night time on a quiet lake in Oak Valley, CA. A lone, middle age woman was walking along the shore, having a good stroll, feeling the cool fall air as she walked along the water's edge. As she walked, she didn't notice the fast moving object in the waters behind her. She heard a splashing sound coming from the waters behind her and turned her head around to see what the sound was. There was no sign of anything following her, so she passed it off as an animal having a cool down in the water. She continued walking along the shore.
She heard another splashing sound, a lot closer to her then the previous one. She fully turned around to see if anyone was there, growing more worried over these sudden, weird noises. She didn't see anything behind her again. Growing more frightened that she was being followed, she stood there watching anything that moved.
Suddenly, she heard a heavy breath from the direction she was heading, feeling it on the back of her neck. Shakingly, she turned back around and hurriedly back up, tripping on her feet and falling to the ground, a look of terror on her face. In front of her was a large figure, darkened by the night, but still very much visible. It looked like it had a frog's head, but a larger man's body, with scales instead of skin, fish fins, an angler fish light and overalls. It's claw-like hands reached down for the woman, the latter screaming in fear of the monstrous being. As soon as the thing was going to grab her, a loud whistle was heard over to the forest. The thing turned it's head, growled and made a large hop over to the forest line. When it was finally gone, the woman fainted out of fear.
In the forest, the thing hopped around, growling and looking high and low for what made the whistling sound. Suddenly, a rock flew out of nowhere and hit the thing in the head. Angrily turning around, he saw what he was looking for. A figure, with dark hair, stubbled face and a calm expression was a few feet away, holding a large, old book as big as a laptop, in his hands. He made a motion to signal the beast to try and take him out. The thing got into a crouched position and made a large jump over to the kid, the latter not fazed by the action. He lifted the book, held it in front of him at the thing and opened it up, the book giving a faint glow. As the thing grew closer, it suddenly stopped in air, the book giving of a bright glow now. The creature looked at it's hands to find them turning into a black, thick liquid similar to ink and heading towards the book. The liquid continued to go up it's arms, causing the beast to be draw further towards the book, which was making a strong inward wind to bring the creature to the pages. The creature was thrashing around and ribbiting, not wanting to be trapped in the book again. At this point, the creature's head was only visible, croaking and whimpering as the liquid enveloped it's head and, ultimately, was drawn into the book altogether with the ink spreading throughout the page, causing the book to close forcefully on it's own. The teen opened the book and flipped to a page, showing writings and pictures of the very creature that was drawn into the book. The teen closed the book, sighing in relief and annoyance at the capture, as he walked to the main road.
Figure: That's the last time I let him into my room and read the book.