Miss P's Home For Peculiar Children

I just started reading Miss Peregrine's Home For Peculiar Children. So far what is happening is that a boy named Jacob works at a Smart Aid which is a chain pharmacy store owned by his uncle. He constantly is trying to get fired, but can never manage to do so. The one day he was working he got paged on the overhead speaker that he had a call on line 2. He went back to the backroom where he picked up the phone and it was his grandpa having a panic attack. His grandpa couldn't find the key and told Jacob that he wasn't safe. Come to find out his grandpa has dementia and Jacob's family would go along with what he said. Also, the key that he was talking about was a key to his chest that he had in his garage that carried loads of weapons. Big enough to supply a large militia. Jacob's father had taken that key, afraid his grandpa would harm himself. Jacob called his father after this conversation and his father told him to go check on him. Jacob's friend Ricky then came and picked him up and they headed towards the grandpas house. Once they got there, Jacob went up to the front door and rang the door bell, but no one came to the door. So he thought maybe the door bell had been broken, so he began knocking on the door. Still no one came to the door. Jacob went and found the hidden key and let himself into the house. Once in the house, Jacob could see that his grandpa had ransacked the place. He went through every drawer and even flipped over furniture, but one thing was missing. It was his grandpa. Jacob went through the whole house and couldn't manage to find him. He proceeded on going outside to the forest the separates the two subdivisions. He found a flashlight lying in the backyard and picked it up and went into the woods while Ricky went back to his car and grabbed a .22 rifle. Jacob went through the woods and came upon his grandpa lying face down in the dirt in the forest. He flipped him over on his back and his grandpa told him to go to the island that he would be safe there.
One question I have so far is what could of killed Jacob's grandpa. Kind of creepy that he was afraid and telling Jacob he wouldn't be safe and is found lying bleeding to death in the woods. This book is one of the best suspense books that I have ever read and would recommend that everyone read it.