The Boy Who Cast No Shadow, by Thomas Olde Heuvelt

It took a bit of digging to find a source for The Boy Who Cast No Shadow, but it was worth looking for.  This is a nice little giveaway from PS Publishing.  In it, we have a boy called Look, who for some reason literally casts no shadow, makes no reflection, can't be seen in media.  What would his life be like?  He tells us a bit about it, being famous for no particularly good reason.  Pretty sad until he meets Splinter, a boy of normal volume but made of glass, only weighing 9 pounds and fragile as can be.  Their friendship and romance form the core of the story, though I would say that the romance is quite mild as that goes.  Alternative bodies are quite common in speculative fiction, but this is a uniquely interesting take on it--usually what we get is that the difference is some kind of superpower but makes the holder misunderstood.  Look and Splinter are just weirdly different, not revoltingly ugly or hiding special powers--just quite unavoidably different.  And reacting to that difference in a pretty normal, but interesting way, not just sublimating it into being superior.  I would say it is worth checking out for yourself.  3 stars from me.