Best thing I've found for holistic, natural healing and care for cats - even touches on cat psychology and communication -- very interesting and informative -- packed with useful information. You can find it on Amazon.com for as little as $6.25!
Fixnation.org - FixNation’s mission is to reduce the population of homeless cats by sterilizing as many as possible while demonstrating the effectiveness of Trap-Neuter-Return and colony management for the humane care of homeless cats.
Catification: Joy’s Easy to Install Cat Climbing Shelves. "These shelves are rated for 25lbs from Home Depot. I used a stud for one and a heavy duty anchor. 75lb rating. They are big white and work. Looks like a huge screw. Not the pop out side kinds(those break)