This book is a study of the nine short poems, called romances, composed by the Spanish mystic Saint John of the Cross (San Juan de la Cruz). The focus of the poems is the Trinity, and their point of departure is the opening verses of the Gospel of John. This is the first in-depth, English-language analysis of these poems, and looks at their literary, historical, scriptural, theological, and mystical elements. It also ties these works to San Juan's better-known lyrical poems and his prose commentaries. It will appeal to anyone interested in Spanish mystical poetry and the sources that inform that poetry.