This is the dramatic story of Angela's passionate love affair with the "suffering God-man," how she is transformed and led into the deep abysses of the Trinitarian life, is recorded in the Memorial, the first part of her Book, which she dictated to her Franciscan scribe and confessor, Brother Arnaldo. The searing intensity of her account is unmatched in mystical literature. After her immersion in the fathomless depths of the Trinity, Angela emerged as a spiritual mother, gathering around her a network of disciples. The second part of her Book, the Instructions, contains her teachings in the form of letters and exhortations to her spiritual progeny, along with accounts of further visions and locutions, a testament, and an epilogue. This is the first translation into English of Angela's book in its entirety. The translation is based on the new critical edition of the Latin text. A comprehensive introduction sets it in the context of the times, and summarizes Angela's inner journey, spirituality, and influence.