Conbrov Personal Security via Amazon offers the Conbrov 720p Spy Book Camera for $79.68. Coupon code "50OFFDV9" cuts that to $39.84. With free shipping, that's $40 off list, $9 less than our May mention, and the lowest price we could find. It features night vision to 25 feet, built-in 10,000mAh battery, and loop recording. Deal ends August 31.