What book does fireheart reveal his love for sandstorm?

Answer:There are two books where Fireheart falls in love:

• In Into the Wild, the first book in the original series, Firepaw starts to fall in love with Spottedleaf. She is a medicine cat, so their love could never have been, and she was killed at the ending of the book. It never said that Spottedleaf had fallen in love with Firepaw but in the play written by Erin Hunter, Spottedleaf's Honest Answer, only found online, Spottedleaf talks about her feelings towards Firstar. She fell in love with him around the time that he fell in love with her and is still in love with Firestar, even in Starclan, but she knew that their love could never be.
• In Fire and Ice, after Sandstorm was rescued by Fireheart from falling over the gourge, she started drifting away from her very good friend and possible future mate if not for Fireheart, Dustpelt. She stopped tormenting him and started being kinder to him and taking more notice of him than before. She and him eventually do become mates and take a large journey together in Firestar's Quest. After the quest, they have two kits, Squirrelkit and Leafkit. These two kits are the center of the next series, The New Prophecy, and then their kits, Jaykit, Hollykit, and Lionkit, are the center of the third series,The Power of Three.