Tantalize (Candlewick, 2007, 2009)?
It's a highlighted October sale title for Kindle readers! You can purchase the e-book for $2.99 (67% off)! See a complete list (with links) of children's-YA ebooks on sale for Kindle/Amazon.com readers from author Cheryl Rainfield.
Limited time only! Sale ends after Halloween.
See also information on Eternal, Blessed, Tantalize: Kieren's Story and the forthcoming Diabolical.