Bluestar’s Prophecy is the prequel to Into the Wild by Erin Hunter. It’s about how Bluestar becomes leader of Thunderclan. It starts when she’s a kit. Soon after this, Thistlekit is born. Thistlekit grows to be a bloodthirsty, ambitious, short-tempered warrior. Then Bluestar (Bluefur at the time) falls in love with Oakheart from Riverclan. She has kits but has to give them away to become deputy. She does this because otherwise, Thistlekit would have become deputy and then leader.
I would recommend this book to anyone who likes the Warrior series. Also, I’d recommend it to people who like adventure books.