(Easy Piano Songbook). You'll love playing from the Hal Leonard "In Easy Keys" series! Each collection in this series includes over 20 songs written in an "easy" key never more than one sharp or flat in the key signature. Melody, harmony, simple rhythms, and fingering are included. Playing your favorite songs has never been easier! The Piano Ballads collection includes 25 songs: All of Me (John Legend) * Bridge over Troubled Water (Simon & Garfunkel) * Candle in the Wind (Elton John) * Hero (Mariah Carey) * Imagine (John Lennon) * Piano Man (Billy Joel) * Ribbon in the Sky (Stevie Wonder) * and more.