As salam alykum warahamatullah wabaraqatu.as a believer in Islam, one of the things that should constantly be on our mind is judgment day ( Yao mil Qiyamaah) because this is the day each soul will be recompensed for what it put forth.this book is just a reminder of the great day, it talked about the major and minor signs that will occur before the day of resurrection occurs. its talks about how the sign will occur in sequential order.its also contain 50 majors and minors signs that has occured, the ones occurinng and the one that will occure in the future that.these sign are extracted form reliable ahadith of the prophet ( peace and blessing be upon him) and verses from the quran that talked about the sign also.may allah save us from the trials of the day and grant us his jannah (AMIN)