Are you hoping to be published? Do have a great idea for a book? Do have a bunch of poems that you wrote and thought would be great to see with an ISBN? Is that email in your spam folder looking very alluring at this point? Don't open it.
If you're like me, you probably saw this great online contest! Write a poem and you will see your name in print! You could win 10,000 dollars! Then when you sent it in, you won the "Poetry Achievement Award", but do you notice that you never win the contest? In fact, you don't win anything. You have to pay for the book that your poem comes in. You have to pay full retail price. You don't get a discount for buying bulk. They tell you that there is going to be an award show in your honor in Vegas. Of course, you must pay your own way: airfare, hotel, etc.
In fact, they don't give you anything, even a percentage of profit. This is a scam. This is Poetry.com. A real publisher gives you a copy of your own book. They help you publicize. They pay you for your work.
Sites like poetry.com make money hand over fist entirely on your and companies like this are particularly insidious because they prey upon the dreamer's lifelong desire to be published. They take advantage of that and then give you nothing in return. Whatever you do, stay away from poetry.com.