The Baha’i World Centre has recently released a new compilation about the Universal House of Justice 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 and Abdu’l-Baha, as well as from the letters of Shoghi Effendi and the Universal House of Justice. It also includes the Constitution of the Universal House of Justice.
Here is the link to read the compilation in its entirety: https://www.bahai.org/library/authoritative-texts/compilations/universal-house-of-justice-compilation/
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 Baha’i writings. Click on “Recent Additions” to see what’s been added to the library.
You may also wish to explore and study the official website for the Universal House of Justice: https://universalhouseofjustice.bahai.org/
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.