How many novelizations of episodes were there after 2001, period? The printed output of Enterprise generally was fairly small, anyway.
Enterprise had 3 novelizations out of 4 seasons (4 if you count "The Good That Men Do" which was kind of a novelization/rewrite of the finale), roughly on par with how Voyager and TNG were handled though quite a bit less than DS9 (a lot of the Dominion War stuff was novelized and expanded) and TOS (where everything was novelized in short story form, primarily due to the lack of home media at the time).
The plan for Star Trek shows seems to be novelize the pilot, some of the season endings/beginnings, the finale, and any TOS cast guest appearances. This basically held true for Enterprise.