Former President Jimmy Carter will remain in an Ohio hospital another night and has canceled his Washington book tour events for Wednesday. His medical team continues to observe him, and Carter is in very good spirits, appreciates all the good wishes being sent his way, and looks forward to getting back to his busy schedule, according to a statement from MetroHealth Medical Center in Cleveland. Carter, who will be 86 Friday, was admitted Tuesday after developing an upset stomach on a flight to Cleveland while touring to promote and autograph copies of his most recent book, 'White House Diary.' He was carried off the jet by paramedics, but a woman who was in the hospital saw Carter up, walking around and talking to others. A hospital spokeswoman said Carter was alert and participating in his health care decisions and looking forward to resuming his book tour. Deanna Congileo, Carter's press liaison at The Carter Center in Atlanta, declined comment Wednesday morning. The peripatetic Carter and his wife, Rosalynn, keep busy schedules, with the former president especially shuttling around the world and the country. Last month, he was in North Korea, where he helped orchestrate the release from prison of an American who had been sentenced to eight years for illegally entering the country. Carter travels to Africa, where The Carter Center is working to eradicate diseases, and to countries such as Lebanon to monitor elections. In Georgia, he shuttles back and forth between The Carter Center and his hometown of Plains, where he is scheduled to teach Sunday school in his home church Oct. 10 and two Sundays in November. Carter's grandson, state Sen. Jason Carter, told the Atlanta Journal-Constitution on Tuesday, 'He's definitely resting comfortably and expected to continue his book tour this week. I haven't talked to him, but nobody in the family is concerned.' Christopher Quinn writes for The Atlanta Journal-Constitution. E-mail: Christopher.Quinn@ajc.com. 