If it's a book you are writing I would change the title to match a .com that is available.

I don't think buying a $1,300 .com is going to push the needle for your book sales.

I would recommend using a .com though, so change up your title slightly if possible.

Or go with CheerfulPandaBook.com or something like that vs. spending $1300 on a domain.

Good luck with your book.