Which paper stock you choose when printing your book can have a huge impact on your print pricing. Coated or uncoated? Glossy finish, matte finish, or standard offset? What's the opacity? What's the weight? The answer to these questions will determine your paper pricing.
Let's start by clearing up a point of confusion among many looking to print their first book: the difference between bond and offset paper weights. When you purchase paper for your copy machine or home printer, you'll note paper is listed as something like 20# bond. What that means is that when the paper is manufactured at 17 x 22", 500 sheets of that paper weighs 20 pounds. However, offset paper for printing plants is manufactured in 25 x 38" sheets, which is 2.5 times larger than bond paper. So 500 sheets of that same paper stock now weigh 50 pounds. Thus, 20# bond is the same as 50# offset.
Typically, I would recommend that for a standard book with just black text (no color) and not a lot of images, 50# offset is just fine. If there are a lot of graphics in the book, you might want to bump up to 60# offset to eliminate some see-through from one side of the page to the other.
Don't assume that the 20# bond paper you saw at Office Depot is going to be identical to the 50# offset paper you asked your printer to use. It won't be. Different paper manufacturers produce their papers with different brightness, different opacity, etc. So always ask for paper samples from your printer.
Now let's assume your book is not as simple as a novel or a book with just black text. Maybe your book needs to be printed in full color. If that's the case, you'll want to use a paper stock that highlights the color better than a typical offset sheet. Glossy paper will usually do the trick.
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.
I'll say it again: Samples, samples, samples. Don't be shy about asking your printer for paper samples. It's probably the most expensive choice you'll make when printing your book; make sure you get it right!
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 has helped hundreds of people print their books. He is a book printing guru. To pick his brain on childrens book publishing, sign up for his Free 7-Part Mini-Course.