Children are born utterly helpless and dependent. Parents prepare for months in advance, but the real work begins after they leave the hospital. Once the kid is born, you have to raise it. A book is no different.
Many authors think after a book is written all the hard work is over. But writing a book is like giving birth to a baby. A baby can’t take care of itself and neither can a book. Both require supervision.
Much like parenting, the book launch process is an arduous and rewarding journey. You’ve produced a living thing, but now you’ve got to make sure it survives and thrives.