Are the accounts in my two books, "The Spirit" and "The Terrors of the Graves and What Comes After Death," regarding the states of the grave and the spirit correct?

The two books, "Al-Ruh" by Ibn Qayyim al-Jawziyya and "Ahwal al-Qubur" by Ibn Rajab al-Hanbali, are important in their respective fields. Their authors rely on evidence from the Quran, Sunnah, and sayings of the Salaf in what they mention. However, this does not mean they are free from inauthentic hadiths, as the authors did not stipulate the authenticity of all hadiths within them.