But it is what it is. And this image from [Indexed] - posted on xmas - makes for a good reminder.
The tagline for the post was "may you live in interesting times" - so a natural summer reading recommendation would be:
Interesting Times - discworld novel #17, a bit of travel, some intrigue and politics, but most of all a great read.
I just finished novel #38 -Unseen Academicals, a great riff on sports, crowds and dreams, so I'm a bit fuzzy on the details for I.T - having read it back in '97 or '98 - but seem to recall it being a bit free standning, in that Rincewind takes a trip to the Counterweight Continent, making it both a jumping on point for new readers (where have you been hiding? 70 million books sold or so? Get with the program!) and a change of pace from the more connected story lines involving the Watch and the Witches.
For a full overview of the Discworld books and their internal principal connections, the LSpace has a "map".
And for some colorful background on the quote or curse, Wikipedia has the goods.