Are the books "Shariat al-Islam" by Sayyid Ali Zadah and "Shariat al-Islam" by Yaqub ibn Sayyid Ali al-Barusawi considered reliable sources in fiqh (Islamic jurisprudence) and adab (Islamic etiquette/morals)? And what is the opinion regarding their authors, especially given that they contain hadiths for which no sources or origins could be found?

The book "Shari'at al-Islam" by Muhammad ibn Abi Bakr al-Samarqandi resembles Al-Ghazali's "Ihya' 'Ulum al-Din" in that it contains much benefit, but also grave errors and misfortunes that necessitate prohibiting its reading except for a specialist who is knowledgeable about the Sufi creeds and fortified with the creed of the righteous predecessors. Its good content is available in other books. The book also contains fabricated or baseless hadiths. Its author, Muhammad ibn Abi Bakr al-Mufti al-Jurji al-Wa'iz, was described by Ibn Abi al-Wafa as a virtuous Imam, jurist, preacher, man of letters, poet, devout, and of good conduct. Hajji Khalifa noted that it is a precious book with many benefits.