[captZEEbo]

[ QUOTE ]
I asked in the investment forum, but they only have too deep book suggestions.

Do you know a book with which i can make the first step to investments?

[/ QUOTE ]it wouldn't even hurt to get something like investing for dummies. Either way, basic investing advice is:
invest for long term passive (buy and hold index fund strategy)
max out iras if possible (sep ira if you file taxes as a professional)
invest mostly in stocks while young.
invest with lowest expense ratios
invest with vanguard.
what vanguard funds? Either:

total stock market + total international stock market
or
target retirement 20xx

investing passively isn't too difficult actually.