What is the program(s) you prefer to use to create the book cover?

We can use any of the following programs Adobe In design, Adobe Photo Shop or Corel Draw depending on the design difficulty  

Well the best program to make professional book cover is Adobe Indesign, It is mostly use for publication and printings.

I like to mix with photoshop, illustrator, and handwork, I feel it gives the work a good original vibe. but sometimes it depends on the style and title of the book, this by itself might specify the medium automatically.

COMBINATION OF INDESIGN, ILLUSTRATOR AND PHOTOSHOP

Adobe Indesin and Coreldraw.., some time u can use illustrator also..