Its a Wonderful World: Leisure & Decadence - one of the 10 best engine builders gets even better!

About It's a Wonderful World: Leisure & Decadence, from BoardGameGeek:

This second campaign expansion for It's A Wonderful World pushes your experience even further! Each envelope introduces a new scenario, and each secret box adds new hidden content! All added components and cards can be used with the core game even after you have completed the campaign. This is not a legacy game, though there are surprises the first time it is played. The cards can be reset and the campaign played again in order to discover both possible endings. Originally available only as part of the It's a Wonderful World: Corruption & Ascension Kickstarter campaign, this expansion is now available separately. Contents: 166 Cards (100 x 65mm) 6 Scenario Envelopes 5 Secret Boxes, including 27 Secret Components 2 Heritage Boosters