What makes a good Sci-fi book?

[Choccodee39]

What makes a good Sci-fi book is, That title that draws them to actually pick up the book. However it must captivate the reader and the entertainment must be so vigorous to keep their focus and suspense as to what's about to happen next. They actually need to believe what they are reading as if it's a true story. Now this is only how I am drawn and moved by good Sci-fi books. What makes it a good Sci-fi book for you?

[Ryan]

I 100% agree! An appealing title and a captivating story are key. I also go for a Sci-Fi novel with both good characters and a world of believable origin which addresses some provocative questions on existence.