All praise is due to Allah, and may peace and blessings be upon the Messenger of Allah.
The author of Akam al-Marjan fi Ahkam al-Jan is Judge Badr al-Din Abu al-Baqa Muhammad ibn Abdullah al-Shibli, a jurist, hadith scholar, historian, and literary figure. He served as a judge in Tripoli of the Levant, where he died while holding that position.
Al-Shibli authored this book following scholarly discussions about the jinn and their circumstances, particularly the question of marriage between humans and jinn and whether such a marriage is possible.
The book is considered one of the comprehensive works on the subject of jinn and their affairs. Imam Al-Suyuti abridged it in his book Laqt al-Marjan fi Ahkam al-Jan.
The book contains authentic information, hadiths, and reports, but it also includes some accounts and information that have not been thoroughly verified. Therefore, it is not appropriate to rely on everything it contains without careful examination.
Shaykh Salih al-Fawzan described it as a generally good book, while Shaykh Ibn Baz mentioned that it is a beneficial work.
Among the useful books that examine reports about the jinn carefully and summarize beneficial information on this subject are two works by Dr. Umar Al-Ashqar:
The World of the Jinn and Devils.
The World of Magic and Sorcery.
Conclusion: The book Akam al-Marjan fi Ahkam al-Jan is a beneficial and comprehensive work on the subject of jinn. However, not everything it contains is authentic. Therefore, the hadiths, reports, and information mentioned in it should be carefully verified rather than accepted without investigation.
And Allah knows best