Summary matters most, trust me small summaries attract even though they're not that good (or  maybe are) the best way to write a summary is to explain in a summarized way and be a little slang like the following summary. (Highlighted words, FOCUS)

Name of the book: 

Casino Kids

Summary:  

My life had been so great but as elders say i'm a kid but kids don't win casino's trust me, i won a thousand times. I'm now a billionaire but it just makes you more....... important??? Nah???? Read for yourself. 

Love ya all

~EA 

This is what i call slang, so you should have a little...... in it?? 

The second thing in summary is as follows.

Book name: Cover Contests

Summary: The title explains it all.

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See??? They got interested. Inbox me for questions for your book