Kevin Kelly says: "A decade ago I made a huge 470-page book of the best tools available. This Cool Tools book was a catalog of possibilities. Each of the thousands of items featured enable a new possibility that you may have never considered doing before, such as keeping bees, building your own home, or starting a consulting busines. Cool Tools has been long out of print, so I finally made a digital version of it. The full-sized PDF of Cool Tools can be downloaded on Gumroad for $3.99. Good news for those outside the US where the price of the original book plus shipping was discouraging. It also serves as a very searchable version for those with the giant physical book."