The Baha’i World Centre has recently released a new compilation on prayer and devotional life which can be read online at the Baha’i Reference Library here. Prepared by the Research Department of the Universal House of Justice, this compilation features extracts from the Writings of Baha’u’llah, the Bab, and Abdu’l-Baha and the letters of Shoghi Effendi and the Universal House of Justice.
You can find this compilation, and many others, on the Baha’i Reference Library which is the official online library of Baha’i Writings. There you’ll also find newly released translations in English of the Writings of Baha’u’llah and Abdu’l-Baha.
If you haven’t already, you may wish to subscribe to the Baha’i World News Service, which often reports when new translations are released, as well as documents the activities of the worldwide Baha’i community.