I would read his books if for one minute I thought they were worth reading. Unfortunately the general consensus among intelligent people would be that they are just bollocks.
By the same degree, I would read books about Hitler's diaries, the Bible Code, Martian Civilisation, Moon landing hoax, etc etc if someone could convince me they were worth reading either.
Just because someone writes a book, and some people believe it presents a convincing case, does not mean that book is in any way credible.
Skeptics are pragmatic, they can't investigate every claim to the nth degree. When Icke condense his most important points into a concise and evidence-backed tome, then I'll stand up and listen. Until then I'll just consider his books elaborate weaving of fact and fiction that satisfy the demands of a niche market.