- eBook5-Day German Language ChallengeChallenge Self
- eBook7-Day Detox ChallengeChallenge Self
- eBook7-Day Brain Power ChallengeChallenge Self
- eBook5-Day French Language ChallengeChallenge Self
- eBook7-Day Confidence ChallengeChallenge Self
- eBook5-Day Spanish Language ChallengeChallenge Self
- eBook7-Day Quit Smoking ChallengeChallenge Self
- eBook7-Day Weight Loss ChallengeChallenge Self
- eBook7-Day Anxiety ChallengeChallenge Self
- eBook7-Day Sleep ChallengeChallenge Self
- eBook7-Day Depression ChallengeChallenge Self