A new lore book has been discovered in Patch 10.0.7! The Naga tome contains some serious hints about future story — are those Old God prophecies coming true, and is Queen Azshara making a return? Thank you to @Queen_Ishura for discovering this!
A Song of the DepthsThe Librarian of the Reach achievement, coming in 10.0.7, involves discovering several lore books being introduced with the patch. One of these books, A Song of the Depths, contains some major lore bombs to say the least.
Naga WrittenFound among Naga of the Forbidden Reach, the book's flavor text reads «A chilling missive written from the deep.» It speaks of a Queen whose return to power is nigh, of a Harbringer who will help bring about this reign, a prophecy, and an awakening. A great deal of the language used directly parallels the whispers of Il'gynoth, with references to the Circle of Stars, lit torches, and a broken heart that will be taken.
Rise, rise! Our Queen calls to us from beyond the Umbral Veil. She has transcended the Circle of Stars and basks in her eternal grandeur! The time we have long awaited is nigh. Even now, the Harbinger gathers the children of the first flesh to reclaim what was lost. They must remember their vows and serve those to whom they owe fealty. While they toil in the deep places, we will journey to the shores of dragon lands, to the blessed isle where the Worldbreaker first embraced the whispers. As one storm recedes, another rises. The torches have been lit. The secrets he buried will strike as a dagger into the hearts of his kin! The Harbinger speaks of a primal power that seeks the end of Order. Such rage can be bent to serve our ends. A hunger lost to the ages will be reclaimed. A dark heart left broken awaits the Read more on wowhead.com