Elissa Malcohn
Re: omnibus.
It is a pretty dubious business from my recent experience.
I have series from a certain publisher, who produced a couple omnibuses of a long series, 2 volumes per ebook. The printed versions Mass Market Paperback: 750 and 960 pages. The resulting epub omnibus is quite heavy even for the latest Sony PRS-650. It means it requires more processing power to navigate it, search through it, change text size, etc. It dramatically affects battery life.
I used to think that omnibus is a very good idea, but I have changed my mind.