I doubt there's such a thing as a bad time to point me towards interesting stuff. As it happens I own the full
Connections and
The Day the Universe Changed series on DVD (as well as most of BBCs production of similar series and programs), but I must confess to not having read the books. Too many good books waiting to be read I guess, whereas TV isn't exactly overflowing with quality programs.
If I may make a counter-recommendation,
Kenneth Clarke's Civilisation is an absolute must if you've yet to see it. While it may seem dated in both form, format and content (it first aired in -68 after all), Kenneth Clarke is superbly erudite, with an aesthetic judgement second to none and the series became the template for all the great BBC documentary productions which followed. All of which you very likely already know already. Available for a song at Amazon on both DVD and BluRay.
As for feeling guilty: don't. I won't be skipping next month's electricity bill because of the Cambridge set, nor go hungry. And I have no doubt I'll love the books.