ubuntu/linux: what is the best known pdf book compostion tool?

[ping]

hi linux/ubuntu folks:

in windows I know there is acrobat, I'm not talking about "producing
pdf" here.

I'm talking about, given a pdf book, how to:
* delete , add, re-arrange pages
* rotake ,flip some pages
* generate the index,
* make a printer friendly layout, like 2 pages per side, with some gaps
for each page.
* etc...

currently I only know of pdftk, that I can burst the whole book into
pages, and delete, add, re-number all pages, then cat them all together
into a new book...

this seems a lot of work with this command line tool.

any better tools ?

thanks!