The Book of Unusual Knowledge

This reprint of the 1897 Sears, Roebuck & Co. catalogue is $13.89, down from $29.99. At 720 pages, it offers a detailed look at goods sold in the late 1800s. Prime members get free shipping. Buy Now at Amazon

This anthology bundles multiple dragon-focused adventures into one volume, useful for Dungeon Masters who want ready-made encounters without building a campaign from scratch, and it's currently $9 off the $50 list price at Amazon. Buy Now at Amazon

Artificial Intelligence, Cybersecurity and Cyber Defense explores the role of AI in cybersecurity and its applications in defending against evolving digital threats. Normally $30, it's available as a free digital download from TradePub through August 25. Shop Now at TradePub

Barnes & Noble's Book Haul sale cuts hundreds of hardcovers by 50%, including titles like Dan Brown's The Secret of Secrets for $19, down from $38, and Paul McCartney's Wings: The Story of a Band on the Run at $22.50. The sale also includes a buy one, get one 50% off deal on Barnes & Noble Collectible Editions. eBooks and audiobooks are discounted too, with some starting at $0.99. This deal ends September 7. Shop Now at Barnes & Noble

At Amazon, get the Travelon Pi Forget Me Not Mini Organizer for $9.52. It's the best deal we've seen for this mini organizer. Shipping is free for Prime members. Buy Now at Amazon

Get deals on a large selection of clearance men's shoes in this Amazon Outlet sale. Discounted brands include Skechers, adidas, and Columbia. Sizes and stock on select styles may be limited. Shipping is free for Prime members. Shop Now at Amazon

At Amazon Haul, get this Shoulder Backpack for $2.85. It's a great deal for such a bag. Shipping is free on Amazon Haul orders of $25 or more. Buy Now at Amazon

At Amazon Haul, get this High-Pressure Car Washing Water Gun for $3.43. It's the best price we could find by $9. Shipping is free for Amazon Haul orders of $25 or more. Buy Now at Amazon