An author I know was recently taken to task by a disgruntled fan because a character in a tie-in novel mentioned visiting the Grand Canyon when, in a recent episode, the same character said he'd never been there. My author friend was surprised that a fan would care about such an insignificant detail. I agree with my friend...especially if you are writing book based on an on-going TV series. It's virtually impossible for the books and the series to not contradict each other over little details. Publishing can't keep up with production...in the time it takes for my finished MONK manuscript to reach the stands, an entire new season of MONK has been written and shot. I have no control over the content of the episodes that are conceived, written and produced after I have written my book. Which is why I added the following disclaimer to my Monk books:
"While I try to stay true to the continuity of the TV series, it's not always possible, given the long lead time between when my books are written and when they are published. During that period, new episodes may air that contradict details or situations referred to in my books. If you come across any such continuity mismatches, your understanding is appreciated."
Bottom line, it's fiction. We are sharing characters in two very different mediums. The fans have to understand that these are characters in a fictional world...and relax.