I just noticed that the Horizon documentation is offered in epub and mobi format. I have been told that this is the first of many more docs to be released in this more universal format. I am happy that VMware decided to adopt this format. It does lead to another question though. I am part of tech marketing and we produce a lot of collateral. Some documents are fairly lengthy and I always have the feeling that many people won’t read docs which are more than 50 pages. Is this any different with epub/mobi? Would you say that these formats enhance readability? If not, what would be a good way of offering documents of between 50 – 150 pages?