To try out the size and format, you could sketch out and print some formats on 8.5x11 paper and use them in a three-ring binder or discbound format for a bit. Bonus is you could print out the line spacing or dotgrid that you like to write on, and use whatever grade/color of paper you want. It would let you see how much/how little you want to write cheaply. I'm sure you've already googled around (and maybe check out Etsy, too?), maybe mock up some formats that look promising in Gdocs or word or something and try them out?
The main consideration seems to be: what do you want to capture, and how much do you like to write about each book? Some folks seem to "journal" with just a brief review and extensive details about book, pages, publisher, etc., and some folks just want to lay down a title/author/rating and write a few pages of Opinions. Do you want to force yourself to do one page per book, or do you want to have formatting that allows you to write for several pages if you want? How much space do you want to leave for your scrapbooky elements vs. writing? If you think those elements will vary from book to book, then maybe it's better to just have blank pages that you can format however you want, which means any book of the right size will work.
For sequencing, for a paper book, I can't see anything but chronological-as-you-read working, unless you want to have sections broken down by genre or something? I don't know, formats like that always seem to beg to leave blank pages. i tend to prefer formats that just let me write from beginning to end without having to guess how many pages to leave for any particular thing. But then, I tend to also only write about a book when I'm done reading it. If you want to write about things in more journal format (by date), then you could do more of a diary by date format and I don't know...have a full review on the date you finish it? I'd also be tempted to have an index at the front listing books and page numbers, and maybe just a list of titles at the end as a how-many-books-I-read tracker.
As for topics/writing prompts on the pages, do you like those or do you find them too restrictive? One way to judge is to look at any reviews you've written on Goodreads or such. See what you tend to like to talk about. For me, if I was going to do a dedicated book reading journal, I'd just do author, title, my final rating, and then maybe sections for what I liked and didn't like. In fact, I might have an index page of "topics to talk about" to refer to, and just refer to it while I wrote as much as I wanted about the book, then moved on to the next book I finished. That's all I'd really need, and it would work regardless of genre or fiction/nonfiction. But then, I don't like a lot of structure when I journal.
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The main consideration seems to be: what do you want to capture, and how much do you like to write about each book? Some folks seem to "journal" with just a brief review and extensive details about book, pages, publisher, etc., and some folks just want to lay down a title/author/rating and write a few pages of Opinions. Do you want to force yourself to do one page per book, or do you want to have formatting that allows you to write for several pages if you want? How much space do you want to leave for your scrapbooky elements vs. writing? If you think those elements will vary from book to book, then maybe it's better to just have blank pages that you can format however you want, which means any book of the right size will work.
For sequencing, for a paper book, I can't see anything but chronological-as-you-read working, unless you want to have sections broken down by genre or something? I don't know, formats like that always seem to beg to leave blank pages. i tend to prefer formats that just let me write from beginning to end without having to guess how many pages to leave for any particular thing. But then, I tend to also only write about a book when I'm done reading it. If you want to write about things in more journal format (by date), then you could do more of a diary by date format and I don't know...have a full review on the date you finish it? I'd also be tempted to have an index at the front listing books and page numbers, and maybe just a list of titles at the end as a how-many-books-I-read tracker.
As for topics/writing prompts on the pages, do you like those or do you find them too restrictive? One way to judge is to look at any reviews you've written on Goodreads or such. See what you tend to like to talk about. For me, if I was going to do a dedicated book reading journal, I'd just do author, title, my final rating, and then maybe sections for what I liked and didn't like. In fact, I might have an index page of "topics to talk about" to refer to, and just refer to it while I wrote as much as I wanted about the book, then moved on to the next book I finished. That's all I'd really need, and it would work regardless of genre or fiction/nonfiction. But then, I don't like a lot of structure when I journal.