What are some good sketch book brands? I have been thinking about getting a new one soon
I know this was specifically about sketching but I have my two cents to contribute after Curry! You also need to determine if you'll be using it strictly for pencil sketching, or if you want to also introduce things like inks, markers, watercolors, etc. If you want an all-purpose sketchbook you'll want to go with a mix media book as it will handle pretty much anything you throw at it (just not excessive use of liquids) because it's a heavier- but not too heavy- weight paper!
You'll also need to consider size when you're making a purchase, is this one you want to carry in a pocket, purse, satchel, backpack? Size will also constrict the space you have for making pieces, so if you want to do a large intricate piece or sweeping landscape you'll need a larger book (like a 9x12in), but if you tend to work on the small side then a smaller book will suffice (6x9in).
Oh, and on the note of spiral-bound vs book-bound bear in mind if you may want to remove a page (WAY easier in a perforated spiral bound) or if you need the pages to lay flat (you can get a very flat surface with a spiral, because you have to account for the spine in a book-bound sketchbook and that will lead to a curved surface unless you get a specially bound book with lay-flat pages.
The huge number of brands and options is staggering, but it comes down to your budget and preference, so for instance all the work I've done for SSSS is in this Canson Mix Media (98lb) 9x12 inch spiral bound book of 60 pages.
So you can get an idea of the mediums (you'll notice very slight warping around the watercolor pieces) and scale I've worked with:
And some other images from various sketchbooks I had lying around!
In the following Bee Paper Company heavyweight recycled paper (70lb) 9x12 inch spiral bound book of 50 pages:
It works well with the collages I did in this honors art history class I took in 2010/2011, the glue and layering actually makes the pages stronger. It also handles inks (no bleeding) and colored pencils really well.
In the following Strathmore recycled paper (60lb) 9x12 inch spiral bound book of 70 pages:
You can see how with this thinner paper, you can't use ink on one side and draw anything on the other because it bleeds through! Also, TONS of wrinkles around the watercolors, but okay with acrylics (color wheel example), crayons, and printers inks (owl rub and print). It does work well for pencil and colored pencil work though, as you can see with the super heroine and neolithic campaign characters (fun fact, Abena was Trinka's shaman character) I did in the back of this sketchbook I bought for an Art for Educators class I took in 2012/2013.
Sorry this turned out WAY longer and more elaborate than I initially thought it would be!!!