Amazon offers a selection of know-how and tips eBook box sets for free, as listed below. (Click "Buy now with 1-Click" otherwise you'll be asked to sign up for Kindle Unlimited.) That's a savings of up to $9 off list. The box sets:

• Herbal Antibiotics eBook Box Set for free ($3 off)
• DIY Gifts eBook Box Set for free ($9 off)
• Leadership eBook Box Set for free ($9 off)
• Body Language eBook Box Set for free ($9 off)
• The Photographer eBook Box Set for free (pictured, $9 off)