Cache Buzzards

#1 - would like to have more to say but am to new to the sport to have much of an opinion.

There is a coin in a cache not far from my house. I didn't take it because I'm not sure what to do, other than move it to another cache. I've seen people buying and trading coins and some say " I found mine the old fashioned way...in a cache". Are we supposed to keep these coins when found? Isn't there rules against that? I like the coins, and would love to collect, but want to maintain etiquette.

Ok, sorry to be rudundent if this has previously been explained - but I am seriously lost. I became a Premium Member so I could download the caches into my trusted and loved Palm in eBook fashion. I downloaded the "tester" book (free example" and can read it great. But..... When I go to a cache I can not find out where to download the eBook version. Once I find that I can easily get it into my Palm, but love my heart, it's like looking for a micro cache in snow! Thanks for any help!