I'm sad to say that my 4 year old has begun to tell small lies. For example:
Me "Have you washed your hands?"
Son " ... yes"
Me "so why is everything so dry in the bathroom?"
And more along the same lines. I wanted to nip this in the bud and talking to him about it or removing treats as punishment just wasn't working. Then I came across this book. It shows the different circumstances which lead small people (and grown-ups) to tell lies including fear of being found out when having done something wrong, bragging to impress, nastiness to exclude one friend and win over another, attempts not to hurt others' feelings. All these situations are understandable and are presented sympathetically.
The narrative then moves onto the consequences of telling lies such as the injustice of others being blamed incorrectly, shame from being found out, anger from those who have been hurt by lying, loss of trust and respect from those around you. It invites the reader to think whether they would win a prize for honesty.
It really helped my son build a healthy amount of shame for his lies and a desire to be more trustworthy in future. He absolutely hated reading it at first but his behaviour has improved immensly in a very short space of time. He has actually asked for it as a bedtime story a few times recently!
This book worked where parental talks, and behaivour modification techniques failed. Highly recommended.