R.L. Stine 
Stuff of Nightmares #4 [PDF ebook] 

It’s the horrifying finale of the Cameron Brothers’ quest to defy death! But for a team of scientists aiming to improve human life, their mortality rate is shockingly high. Perhaps it’s true what they say, three can keep a secret, but only if two of them are dead Don’t miss the conclusion to R.L. Stine’s first original comic book series for older audiences!