Violet Ink by Rebecca Westcott

Author of Dandelion Clocks, is a beautiful and brilliant story of two sisters, which fans of Cathy Cassidy and Jacqueline Wilson will love.

Quiet, contemplative Izzy has always adored her charismatic, confident older sister, Alex. But when Alex starts going out with a new boyfriend, everything changes. Izzy isn't sure she can still trust her sister — but she will never stop loving her. Letters from Alex, written in her distinctive purple pen, keep their relationship alive...