Borrowed and Lost

 is a side quest in Torment: Tides of Numenera.

Synopsis
Falinda, a bookseller in Circus Minor, has accused me of borrowing a very rare book and never returning it. I have no memory of such a thing, so it seems likely that the Changing God was the real culprit, perhaps when he was wearing the body that is now mine. It seemed important to Falinda that I find and return the book. I need to find the book that "I" supposedly borrowed. Falinda didn't provide any clues about its whereabouts but did mention that the book has a five-colored sigil on its cover.

Walkthrough

 * The goal is simple. After talking to Falinda, progress in the story until you reach the Buried Crossroads. The Tome of Singing Thorns is in the chest there. Remember to use it before returning to Falinda.
 * You will be given a choice between four books:
 * Angule and the Greater Good (worth, raises Indigo and Blue tides)
 * Two Weeks and a Day (worth, raises Red tide)
 * Humming and Hiding (worth, raises Blue tide)
 * Known Powers (worth, raises Silver and Blue tides)
 * You can also decline to take any of the four books, which raises Gold Tide moderately.