What I want to know is who the killer stamp was intended for. I thought it was Drew, but everyone else seems to think it was Vera. It seems to make more sense for it to have been Drew, because then, had the plan worked, his death would have forced Vera to leave her home, which would have made her bite her nails, killing her too. To have targeted Vera with the stamp would have been odd, as there would have been no real reason for her to lick the stamp other than her love of what it depicted, and there was no guarantee that she would even see the stamp.

The stamp was intended for Drew for when he would reply back. However, Vera took it, indirectly saving his left until the events of 4-4 happens. Kristoph messed up by choosing a stamp with a her favorite subject of her's on it. If he sent a normal stamp instead with the letter, things would have been completely different.

Adding onto to BP Vera was able to draw an exact copy of that stamp onto the letter, making the postman believe it was real. She and Drew didn't know the stamp and nail polish was poisoned.

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if i remember drew never replied then vera framed the stamp then 7 years later drew choose to right a letter back to khristoph i can't remember why and that stamp was the only one he could use since he couldn't find anymore

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I'm thinking the stamp would have had to have been for Vera. The stamp he used wasn't an ordinary stamp, it was a commemorative stamp, meaning that Kristoph didn't just have it in a package of stamps, it was bought separately. He'd have no reason to by a stamp with the Gramyre troupe on it if it was for Drew; the stamp was specifically to appease Vera.

Also, he doesn't have a reason to kill Drew, because Drew never saw him. Vera, however, met Kristoph face-to-face and therefore could reveal his identity.

Though it's a bit contradictory in the end. It would seem that because Kristoph set up the fingernail polish for Vera, that the stamp would have to be for Drew, especially considering that one could only assume that Drew would be in charge of the finances (An 11 year old girl certainly couldn't do it) Perhaps Kristoph didn't care who he killed. With Vera actually making the forgeries and Drew being in charge of the buisiness of it, it wouldn't matter who he killed. If Vera died, there would be no one to testify as to Kristoph's identity and Drew wouldn't be a threat, and if Drew died then Vera would have to leave the house, so she would put on the nail polish and probably bite her nails and die too.