Looking on the internet deeply has found these results:

I will buy a book as your present is the most popular phrase on the web.

I will buy a book for your present 178,700,000 results on the web	I will buy a book as your present 1682,000,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
Look, when I'm in the mood to read fiction, I will buy a good book. Serena, I buy a book for my dad every Christmas. Maybe this will buy a few books for the new school. I will buy a new car next month. I will buy a car next month. Serena, i buy a book for my dad every Christmas. I will buy a new car next month. And I will listen to Mumford and Sons with you and I will not make sarcastic remarks and I will not dance ironically and I will do everything you want and I will make you happy and we will buy a house	And I will listen to Mumford and Sons with you and I will not make sarcastic remarks and I will not dance ironically and I will do everything you want and I will make you happy and we will buy a house I will buy a huge American hat in order to enter the American family. I will buy a third of them and see what I can do. But give us what you have now, I will buy a gravitsapa from them. I will buy a new car next month. I will buy a car next month. I will buy a new car next month. Look, when I'm in the mood to read fiction, I will buy a good book.

I will buy a book for your present

178,700,000 results on the web

I will buy a book as your present

1682,000,000 results on the web

More popular!

Look, when I'm in the mood to read fiction, I will buy a good book.
Serena, I buy a book for my dad every Christmas.
Maybe this will buy a few books for the new school.
I will buy a new car next month.
I will buy a car next month.
Serena, i buy a book for my dad every Christmas.
I will buy a new car next month.
And I will listen to Mumford and Sons with you and I will not make sarcastic remarks and I will not dance ironically and I will do everything you want and I will make you happy and we will buy a house

And I will listen to Mumford and Sons with you and I will not make sarcastic remarks and I will not dance ironically and I will do everything you want and I will make you happy and we will buy a house
I will buy a huge American hat in order to enter the American family.
I will buy a third of them and see what I can do.
But give us what you have now, I will buy a gravitsapa from them.
I will buy a new car next month.
I will buy a car next month.
I will buy a new car next month.
Look, when I'm in the mood to read fiction, I will buy a good book.