Read along Sanskrit, Srimad Bhagwat Katha Mahatmya, chapter 1 shloka 1 to 23
Srimad Bhagwat Mahatmya is a preface to Srimad Bhagwat Purana by Ved Vyas ji. This is the why of the epic, explains the benefits and reason for it being composed by Maharshi Ved Vyas ji.