My site is every time removed from search engines.

Dear All,

Just joined the group, I can imagine that this questions has been asked over
and over again. I run a small website to promote some of my books. Search
engines pick up my website and several weeks later I am dropped again. Just
did a search on the major 10 engines, only 1 was listing me compared to all
10 last week.
Is it wise to give my web address or I am going to be seen as a spammer.

Many thanks,

Bert.