We picked up a notebook at Peace Valley Dry Goods in Boise. The first two pages had a bunch of 4-diigt codes. 

This puzzle required visiting 16 FedEx stores around the country to pick up a single sheet. Those 16 sheets are collected in this PDF.

The full solution is on our What We Know page.

We picked up a notebook at Daytrip Society in Kennebunkport. The first 9 pages had a seemingly random arrangement of stamps, and the last page had 9 strange clues.

The full solution is on our What We Know page.

We picked up a notebook at Coffee Studio in Chicago. The first two pages had 10 weirdly worded sentences.

The full solution is on our What We Know page.

We picked up a notebook at Old Fox Books in Annapolis. The first two pages had 9 sentences that seemed to relate to the moon somehow.

The full solution is on our What We Know page.