<PERSON> discussed this to an extent with ComingSoon.net. He was asked about <PERSON>, who is the most prolific of the <PERSON> <PERSON> writers, having written sixteen novels between 1979 and 1996:
CS: Have they decided not to adapt any of <PERSON> novels?
<PERSON>: I don’t think they ever would, because they don’t own them. I don’t know what the deal is with that. We’re taking the original idea. The funny thing is if you read <PERSON>’s (novels), which I try to plow through occasionally, there’s an awful lot of story lines that have never been used because obviously the films are based on the books. There are still ideas that we can sort of pluck from.
This seems to be confirmed on the wiki of Ian Fleming Publications, who own the copyright to <PERSON> as a novel character. 26
This can be compared to EON who appear to hold the copyright to <PERSON> as a film character.
Following this logic, it would be costly for EON to purchase the rights to any of the continuation novels.
This doesn't mean they haven't borrowed content from the novels before. This has been discussed over at the MI6 Community, with one poster noting similarities between the License Renewed novel and <PERSON> films:
Licence Renewed: <PERSON> gets his first glimpse of villain industrialist <PERSON> at England’s famous Ascot racetrack.
A View to a Kill (1985): <PERSON> gets his fist glimpse of villain industrialist <PERSON> at England’s famous Ascot racetrack.
Licence Renewed: <PERSON> poses as a weekend party guest at <PERSON>’s large country estate in Scotland.
A View to a Kill (1985): <PERSON> poses as a weekend party guest at <PERSON>’s large country estate in France.
Licence Renewed: <PERSON>’s SAAB ejects tear gas from its vents when surrounded by henchmen.
Tomorrow Never Dies (1997): <PERSON>’s BMW ejects tear gas from its vents when surrounded by henchmen.
Licence Renewed: <PERSON> fights henchman <PERSON> in the cargo hold of C-130 over Spain in the book’s climax.
The Living Daylights (1987): <PERSON> fights henchman <PERSON> in the cargo hold of C-130 over Afghanistan in the film’s climax.
There are plenty more examples of these similarities over there.
Another factor to consider with regards to adapting parts from the continuation novels is the fact EON have always put so much original content into the films anyway. The <PERSON> novels written by <PERSON> are very different to the films that were released, as <PERSON> wrote within the technological constraints of the time (so Moonraker does not take place on the Moon, for example) and made his "Bond" protagonist much more realistic (meaning he fails quite often, can't take three guys on in a gun fight etc).
Given EON disregarded so much of the original novels, it seems likely they could/would do something similar with the continuation novels. So not only would they have to pay to adapt the novels, they'd likely not use large portions of the novels, making it even more of an unnecessary cost.
Finally, the scripts for <PERSON> films aren't too difficult to come up with. They tend to follow set patterns, with the gorgeous woman, the slick lines, a few car chases, etc. Given this, there doesn't appear to be a shortage of scripts or ideas for EON to use in creating the films.
So in summary, there doesn't appear to be any desire to turn any of the continuation novels into films, probably because EON don't own the rights to them and it would be costly - but that doesn't mean they haven't borrowed elements from the novels for use in some of the modern films. 570