Skellig by David Almond
On moving into a new home, our protagonist finds a strange humanoid creature in the rickety old garage and decides to care for the fragile being. With a seriously ill baby in the house, the parents don’t seem to notice their elder child’s unusual new friend, but kindness is repaid in turn and he could be just the help they need.
Gargantua by Carl Grose
When Mr. and Mrs. Mungus have a baby, it isn’t the bouncing blue-eyed boy they were hoping for. After a two-and-a-half year pregnancy, Mini Mungus gives birth to a monster – one with an accelerated growth rate and an insatiable appetite for anything that moves (including joggers). But when sinister military scientists become intent on cloning an army of giant babies from the giant, he breaks his chains and escapes. The world can only watch in horror as he embarks on learning how to walk and rampant destruction. Who will stop this freak of nature? Who will decide his tragic fate? And who, more importantly, will change his nappy?