Original: Heine's one-sided infatuation with his cousins Amalie and Therese later inspired him to write some of his loveliest lyrics; Buch der Lieder (Book of Songs, 1827) was Heine's first comprehensive collection of verse.
Simplified: Heine's one-sided infatuation with his cousins Amalie and Therese later inspired him to write some of his loveliest lyrics; Buch der Lieder ("Book of Songs", 1827) was Heine's first comprehensive collection of verse.