It is also published under the title "Fountain of Wisdom: A Collection of Writings from Baháʼu'lláh".

Sixteen Tablets revealed by Bahá'u'lláh during the later years of His life, including the Tablet of Carmel, the Book of the Covenant, and the Tablet of Wisdom, as well as excerpts from other Writings. Six of the tablets in this volume were translated into English and published in 1917. The translations were improved upon by Shoghi Effendi, and those not translated by him were filled in with the publication in 1978 under the supervision of the Universal House of Justice. [wikipedia]

Publications:

• Do'a: On Wings of Prayer: First published in 1933, then in 1938 and 1953 as Do'a: The Call to Prayer. It was reprinted in 1974 and later in 1984. The book has been described as "A broad Bahá'í approach to prayer and mediation of 'the practice of the presence of the Spirit of God', using quotations from the Bahá'í Faith and other religions." [BELp105] Her formula, which has become known as the "Five Steps of Prayer", and was printed in Principles of Bahá'í Administration published by the National Spiritual Assembly of the British Isles in 1953 and was cited by the Universal House of Justice in its message of the 11 October 1978.
• New Keys to the Book of Revelation: Published in New Delhi in 1977 and reprinted in 1989. [Collins p105] It contains a chronology of the events in the Holy Land.
• A Pilgrimage to the Holy Land: Published in Honolulu 1980. This was also entitled Visting the Bahá'i World Centre. It consisted of notes from her pilgrimage May 17 - September 17, 1954. [Collins p105]
• The Cause of the Rise and Fall of Civilizations: This was a chart that she produced after her pilgrimage. It is her own interpretation of history.
• Her essay, The Dynamics of Prayer was published in SoW Vol 21 Issue 2 p47 in May 1930. A 'cleaner' PDF is available here.