Thmyl Ktab Alrwd Alatr Fy Nzht Alkhatr Mjana 〈ORIGINAL × Tutorial〉

If you’ve come across the title Al-Rawd al-Atir fi Nuzhat al-Khatir (الروض العاطر في نزهة الخاطر), you may be wondering: What is this book? Is it worth reading? And can I really find it for free online?