one of my mobi format books was not appeared in Amazon service since I bought it

Hi, 13 books I bought from O'Reilly are with Amazon mobi format, but I only see 12 books on my iPAD kindle app via Amazon service. One book "Prototype to Product" is missing. I have never seen it appeared in Amazon service. Does anyone know how to make that book available in Amazon service? Thank you very much.
1 person has
this problem