With hundreds of available paper stocks, the decision of which paper to use for your print run can be overwhelming. Most of all, it's a decision determined by the type of book you are printing. A children's or coffee table book? You'll need a thick glossy sheet to help your color images stand out. A novel? Go cheap.
Book paper weights are different than the paper weight measurements you will see in an office supply store. A 20# bond that you would find at Staples is similar to a 50# offset at a book printer. A 24# bond is similar to 60# offset, 28# is similar to 70# offset, etc.
That 50# offset paper proves to be fine for many books. If your book has no or few images and no color inside, there is little reason to print on a much thicker paper. Save your money. You may want to check the pricing for 60# offset, but I usually don't recommend printing on paper much thicker than that for most novels, etc.
One thing I cannot emphasize enough - get print samples. There are a couple times when I have had a client tell me they knew exactly what type of paper they wanted to use, but then they were disappointed when they got the final product. Why? A friend of theirs had told them which paper stock to choose, and they ordered their books without ever seeing a paper sample. Don't make the same mistake!
Choosing paper stock for a book printed in full color is sometimes a little trickier. You may want to go with a glossy paper stock to make any images "pop" a little more. However, glossy stock often feels thinner than standard paper stock.
Also, if you are printing in full color, you'll definitely want a thicker paper stock. You don't want any see-through for your color images from one side of the page to another. I usually recommend 80# gloss for most color books. If you want a little thicker, step up to 100# gloss. If you are trying to save cost, drop down to 70# gloss - but never less than that.
Again -- always get samples before making your decision!
When it comes to cover stock, for a paperback book a 10 pt. C1S cover is standard. However, it is usually very inexpensive to upgrade to a 12 pt. C1S cover. People do judge a book by its cover, so this might be a cost-effective upgrade.
Author Resource:-
Josh Prizer is a print broker who has helped hundreds of people print their books. He is a book printing authority. To pick his brain on childrens book publishing, sign up for his Free 7-Part Mini-Course.