Possible Clues:

• Feature of thrillers from American writers in the Florida area?
• Meaning to embrace unique selling point, leaves one hanging
• Return of American poet mostly creates excitement
• Indecision
• South American writer on large body of water? Without a doubt
• Cliffhanger feeling
• Mixed up senses in state of uncertainty
• Tension -- feeling keeping us quiet
• English poet briefly embracing American characteristic of thrillers
• Now and then, Seuss writes with energy and tension