100 simple secrets of happy people : what scientists have learned and how you can use it

"Briefly explains one hundred ways to improve one's daily satisfaction with life, presenting simplified information learned in scientific studies on happiness."@en
"Briefly explains one hundred ways to improve one's daily satisfaction with life, presenting simplified information learned in scientific studies on happiness."

"The 100 simple secrets of happy people : what scientists have learned and how you can use it"
"100 simple secrets of happy people : what scientists have learned and how you can use it"@en
"The 100 simple secrets of happy people what scientists have learned and how you can use it"@en