ei saptadaśa prakāra ādi-līlāra prabandha
dvādaśa prabandha tāte grantha-mukhabandha
ei saptadaśa—these seventeen; prakāra—varieties; ādi-līlāra—of the Ādi-līlā (First Canto); prabandha—subject matter; dvādaśa—twelve; prabandha—subject matters; tāte—among those; grantha—of the book; mukha-bandha—prefaces.
Thus there are seventeen varieties of subjects in the First Canto, which is known as the Ādi-līlā. Twelve of these constitute the preface of this scripture.
Link to this page: https://prabhupadabooks.com/cc/adi/17/328