Are Tom Clancy/ Splinter Cell books still published these days?

I bought the first book a few weeks ago off Amazon but am struggling to get hold of any others unless I buy used ones.

I did manage to order the 2nd book off eBay but it never arrived so I had to get a refund 🙄

is it likely these books are just out of production forever?

The new ones seem to be available but I'd rather start from the beginning