Grammar Voyage is designed to build on the foundations established in Grammar Island and Grammar Town, both in terms of the four-level analysis and visually. It reinforces the vocabulary of Caesar's English II and the poetics of A World of Poetry, as well as the spirit and intellectual demands of Essay Voyage. The ship paintings offer a beautiful counterpoint to Michael Clay Thompson's lovely color illustrations of grammar concepts.We recommend getting both the student book and the teacher manual for Grammar Voyage, as there are too many places where the teacher manual gives away the answers to questions and exercises.