Suspense is not the same as not knowing where your plot is going.
Hooking the Reader
First line hooks from most to least effective:
1 - QUESTION - "Where’s Papa going with that Ax?" from E. B. White’s Charlotte’s Web is one of the best opening lines ever. You want to plant a question in the reader’s mind.
2. - DIALOGUE - "Men are the most arrogant, helpless and stupid creatures on earth." Once again the reader wants to know why.
3 - INTROSPECTION - "I always wondered what it would be like to jump off a building." The contrast of danger and calmness is somewhat compelling.
4 - ACTION - "Leighton scanned the new green of the hayfield from the back of his cantering horse."
5 - SETTING - "It was night and Daniel was hanging over the heaving side of the Little Sarah felling rather unwell."
6 - OMNISCIENT - "Two riders moved up the road through a light rain."