Well you do of course need Word to create a Word docx file for a book and it is an App for the Ipad
I think Lulu's Wizards may be a Flash prog, so you will need Flash also. Ironically this little guide is Flash >>
I would suggest not using a tablet at all but using a laptop or a desktop.
Slower and less powerful than an Ipad?!!!
I will assume your Ipad is also using wireless? Perhaps even by a cellphone tariff?
The other advantage of laptops and desktops is you just plug them in to a modem connected by (hopefully) a fast internet connection
If you created a doc it should tell you where it saved it to. Upload the doc from there. I am not sure it will work in the Project Wizards though, being an app for an Apple, and a tablet at that.