Sorry HarryT
I buy a new toy, I go onto Safari to download the Quick Installation Guide and the User Manual/Guide then "Open in iBooks", Calibre doesn't come into the equation
I'm also sorry but my experience with Calibre led me to the conclusion that it isn't very iPad friendly. The procedure to get stuff off Calibre into an iPad is, in the least, convoluted
Well that's my impression anyway, rightly or wrongly.