Those books full of symbols
from common (and even not-so-common) dreams
. They usally say that, without any knowledge of the interaction of the symbol with other things, that this symbol will foretell
some omen. This usually makes dream dictionaries very different from ones made by other publishers. For example, in Excite
astrology center's dream dictionary, death
was considered a good omen
meaning good news was sure to come. However, in Tony Crisp's Dream Dictionary, death was the symbol of change
(this is probably the one I'm going to buy into, because it isn't trying to give me a fortune-telling), and Miller's 10,000 Dreams Interpreted believes that death is the key that brings sorrows.
Most people who use dream dictionaries alone to interpret their dreams end up very dissapointed when they find out they aren't a dream prophet.