description go ahead and buy it I know this particular session is all about data science with respect to free but I'd suggest this particular book you know don't search for free PDFs keep this book handy because it will help you for the lifetime okay whenever you want you can basically leave this now the next thing comes that there are small small parts like feature engineering feature selection what you have to do is that I'll be sharing a very good github link about feature engineer and feature selection which I found it through the