Sorceress of the Dryads - Legend of the Singer, #2

The magic of the dryads does not come at a priceBut it binds the Singer to the Pact of the forestsTo keep her nature or be corrupted When the corrupted half-elf Prince Anakrim takes the throne upon the deaths of the aged King and Queen, and promises the elven people the return of their long-lost magic, the forests of Elethri begin to languish.The dryads and Tara-lin must join their magic as never before to end Anakrim's menace without violating their natures and further harming the forest.
But in the midst of the upheaval, Tara-lin finds herself in a position of influence she never wanted. With the help of the dryads, she must stay true to her own song and lead the elves to discover and nurture their individual magic.