Whilst I wouldn't describe the book as 'super glorious', from the condition of Jupiter it is definitely strong and 'powerful' - it's not the book that's the problem it's the publishers. Saturn is conservative, highly structured and 'rule bound' and when in poor condition, is afraid, fearful, unwilling to act or be decisive. Saturn is the planet of melancholy, either self doubting or doubting the value of action. What Saturn is not is a risk taker.
In the context of the reading, the prospective publishers are unlikely to take your book if they perceive it as risky or it doesn't fit in with their perceived model of what consumers want and what will sell. The reading suggests that they are wrong, but that doesn't mean that they will recognise this and take the book. In many ways the book's symbol, Jupiter is the opposite of the publishers symbol Saturn. Jupiter is expansive, joyous, helpful, lucky, optimistic; Saturn is restrictive, hidebound, analytical, careful, pessimistic, fearful. That's not to say that the book has all those qualities, but to say that the book has qualities that publishers will be suspicious of. It doesn't meet their preconceived expectations and it's very difficult to get them to shift that preconception.
The problem with 'hidden enemies' is that they are 'hidden'. In fact it's not necessarily another person, it could be you! the twelfth is the house of self undoing so you might be unwittingly taking actions which make things worse, or it might be someone else who either consciously or unconsciously acts in a manner that is against your interests. They may not even know you exist but there behaviour might harm you - such as a Finance Director who says that there's no more money available for new and untried authors.
I'm not sure of what Saturn represents outside this reading as far as you are concerned, but from your other post it seems that Saturn keeps popping up in one form or another, You either need to adopt a saturnine approach to your life or you need to cast off Saturn. I haven't got a copy of your chart so I can't hazard a guess as to which it is.