Are you interested in creating pop up cards of your own design? Not sure which pop up instruction book or books are the best of the best? These are my favorites--the ones I'd want if I were stranded on a desert island!
First up, if you're only going to buy ONE book about how to make pop ups, I suggest Duncan Birmingham's Pop-Up Design and Paper Mechanics. I waited for years for this revised edition to be published. I loved the first version, but it had been so long out-of-print that I whenever I wanted to read it I had to interlibrary loan the last remaining copy in the state--which is in a prison library. (Begging the question: are prisoners allowed to have craft knives??)
Pop-Up Design and Paper Mechanics: How to Make Folding Paper Sculpture, from Amazon,
or from Book Depository (free shipping worldwide).
Next on my list, especially helpful for those of us who like to see and touch something to see how it works: The Elements of Pop Up by David Carter and James Diaz. This book has working models of the most common pop up mechanisms. I use this as a reference when I want to refresh my memory on the best way to make a specific 3d shape.
My third go-to book, Making Mechanical Cards by Sheila Sturrock, is not technically all about pop ups, but I believe most people do not really care about the distinction between "pop up cards" and "mechanical cards."
Sturrock's book includes designs I have not seen elsewhere, mostly mechanisms from the great card makers of the past. I am grateful to her for digging up these cards in museums and working out how they were made. She includes full size templates for each mechanism.
If you already have these three, my next purchases would come from this list (some are out-of-print).
Kirigami: The Art of 3 Dimensional Paper Cutting by Laura Badalucco: from Amazon.
The Art of Paper Folding for Pop Up by Miyuki Yoshida: from Amazon.
Paper Engineering for Pop Up Books and Cards or Up Pops by Mark Hiner: from Amazon.
Full Disclosure: I received no compensation from any of these authors or publishers, nor any complementary review titles.
Extreme Cards and Papercrafting: pop up cards, movable and mechanical cards, digital crafts and unusual papercrafts.