I haven't seen the comic book, but I agree that Mapping Inner Space is a very good book. There is an entire section on graphics that is excellent for those of us with limited drawing capabilities.
I own the Wycoff book and find it very useful. It is more down-to-earth than the Buzan book. It just seems more practical.
I own The Mind Map Book and I think it is a great book. The illustrations are very interesting but they tend toward the complex and aren't as useful as an aid to doing your own mind maps. His procedures are good but just aren't as intuitive as the other books.
I think all are worth owning but for different reasons. Mapping Inner Space for those who want to make their mind maps more creative. Wycoff's book for people who want practical ways to use mind maps. Buzan's book for people who want the Bible on mind mapping.
The cassettes by Michael Gelb are also very good for beginners.
