Mondays Are Red should really be read twice.
It should be read the first time to be entertained by the plot and the characters and the story itself, but it should also be read a second time, just to enjoy the words. They deserve a reading all to themselves.
I won't elaborate on the story, as there are other reviews which have explained it beautifully, but I do think that Mondays Are Red is about change. It's about how we might feel if we woke one day and saw the world differently, and how we would deal with the challenge of an entirely different view. It's also about the power of language, and reading the story has really made me question the self-imposed filter we place on the world, created purely through our own choice of words.
Mondays Are Red is classed as young adult fiction (which, of course, it is), but it's really a book for anyone who enjoys language. Luke's descriptions of his new view of the world are just magical and will stop you in the middle of a paragraph, just to savour them.
And if you're anything like me, it will make you ever-so-slightly jealous of anyone with synaesthesia.