For quick surveys there are three places one can expect to find useful and short discussions of any topic on philosophy: (1) Wikipedia, (2) the Stanford Encyclopedia of Philosophy and (3) the Internet Encyclopedia of Philosophy. The references in these sources can lead one further. One can look for these sources when doing an internet search.
Here is the question:
is there a relatively short article (<30 pages preferably) on Dennett's view of the mind-body problem?
One of the shortest introductions, and the reference I recommend starting with to answer the OP's question, is the Wikipedia article on Daniel Dennett focusing on the section on his philosophy of mind of only a few paragraphs in length. These paragraphs give the following information:
- Dennett is looking for "a theory of content" and for "a theory of consciousness". Expect to see this "bipartite structure" in his writings.
- He has a "multiple drafts model" of consciousness. This model has its own Wikipedia entry: https://en.wikipedia.org/wiki/Multiple_drafts_model He is quoted as writing: "Information entering the nervous system is under continuous 'editorial revision.'" in Consciousness Explained.
- He is associated with "neural Darwinism" which also has a Wikipedia entry: https://en.wikipedia.org/wiki/Neural_Darwinism He has an "argument against qualia" and thinks qualia "does not constitute a valid refutation of physicalism".
- He takes a confrontational approach to his colleagues with this quote from The Message is: There is no Medium: "My refusal to play ball with my colleagues is deliberate, of course, since I view the standard philosophical terminology as worse than useless—a major obstacle to progress since it consists of so many errors." Look for and critically assess the specific details on these "errors".
- He claims in Consciousness Explained: "I am a sort of 'teleofunctionalist', of course, perhaps the original teleofunctionalist'". This is another keyword to use in searches for more information.
From here one has a framework from which to explore further.
Wikipedia, "Daniel Dennett" https://en.wikipedia.org/wiki/Daniel_Dennett
Wikipedia, "Multiple drafts model" https://en.wikipedia.org/wiki/Multiple_drafts_model
Wikipedia, "Neural Darwinism" https://en.wikipedia.org/wiki/Neural_Darwinism