I said I'd write a little about how I approached this. I'm pretty sure that this is not optimal in any way as I'm very new to the program but I like the end result.
The first thing was building a book. I looked at various free models but couldn't find one that I could work with. I wanted a book that was nice and curvy since a decently thick book doesn't lay flat when it's opened. To do this I've used the "bender" nodes in Fusion that will take an object and distort it in various ways. There are handled on the tool to affect only part of the object as well. Here's one of my bends.
bender.png
The book pages start a as "cube" - I changed the length of the edges to make a box then applied my first distortion as a sheer to give the look of pages that had slid over each other.
cube1 (Small).jpg
I then used the applied two bends in opposite directions to curve the ends the pages.
cube2 (Small).jpg
cube3 (Small).jpg
I needed to apply a "transform" between these tow bends to being the end of the page back on to the axis of the bend. if you don't do this you simply undo the bend you just applied. Once I had one set of pages I could take two outputs from that node and transform one to mirror it to make two sets of pages. The advantage here is that if I tweak the bends at all both sets of pages are affected at the same time.
book pages (Small).jpg
The book covers are more "cubes" with the spine having another bend applied to it to curve it inwards.
covers (Small).jpg
Putting them all together an applying some textures I found online gives the final book model:
book (Small).jpg
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