Amazon.com has Paint by Sticker Kids: Unicorns & Magic (Paperback) for $3.99. Shipping is free with Prime or on orders $25+. Thanks TattyBear
Also available, Amazon.com has Paint by Sticker: Travel (Paperback) for $5.55. Shipping is free with Prime or on orders $25+.
Alternatively, Walmart.com also has Paint by Sticker Kids: Unicorns & Magic (Paperback) for $3.99. Select free store pickup where stock permits, otherwise shipping is free on orders $35+.