Your comments

In the image above, I added 3 leaves of a book. I think it’s cumbersome to have to adjust each side of each leaf – as it is, it’s quite a lot of work to set up each leaf. Books typically have all their pages the same and books that are mainly text, will have a matte finish. The default for a book has to be matte. For a book cover, I would make the default semi-matte. 

I understand that gloss is subjective, but I don’t think it’s a problem to have three base settings that you can adjust, just like you have different book models. 

I have never ever in real life ever seen a reflection of another page even in the glossiest of full colour books!

Also, whilst discussing the settings, I think there needs to be some visual feedback when adjusting the settings for a page.

For example in the image below, I think I made the colour pages 50% roughness, and I think I made page 394, 100% roughness

However, if you look, I have lost some of the brilliance of the image by using 50% roughness.

so this is 100% roughness. much better

okay, I’m rendering now with 100% roughness on all the pages. I would have thought that there should be three basic setting corresponding to the three paper types: matte, semi-matte and glossy. Further if a person wanted to adjust those built-in settings for books, then it would apply to all pages.

and here too, I only just noticed it, the text has been reflected into the image like glass. 

another comment, I appreciate the reflection and shading, but this is for books that are made of paper. Some books are indeed glossy, but for a regular book, the paper is matte and I wouldn’t expect to see any reflection like I see here. The opposite page isn’t really a light source here. 

Of course I could have my settings all wrong. For this example I played with a high refraction and high roughness to see if it would help.

understood. thank you.

also there is a bug when the model is “open in the middle” that the back side looks like this:

I don’t understand. If the width of the page is 15×22 and the spine is 1, then the cover is going to be the width of the page × 2 + the spine, ie 31 and the height will be 15. For a paperback book this is easy. For a hardback, then you will have to manually put in the difference in size between the cover and text block.

Oh gosh yes! I also find this to be a real issue with version 5.

another observation, if I have a book spread and I want to add a cover spread, there doesn’t seem to be an option to wrap cover like there is in a book cover. I realise that it’s probably more important for the inside book cover to be able to add just one image, but it would be nice to be able to quickly put the full spread on the back.