Perfect for younger readers, The Two Princesses of Bamarre is a cute story about shy, reserved Addie trying to save her strong, outgoing sister Meryl from the Grey Death. Addie's character development is obvious but moving. (view spoiler)[The end avoided the obvious cliche of Addie saving Meryl from the Grey Death; what happens instead is something much better (though still a tad cliche). (hide spoiler)] 
 I recommend this for younger readers because the plot devices and cliches are very obvious to older ones; the lesson in the novel - try things that are outside your comfort zone - is great, but older readers may tire of its repetitiveness.