There are five issues of this magazine scattered in the island. Each issue has a bonus perk that will remain in effect as long as you have the DLC installed on the console. Collecting all issues will unlock the "The Islander's Almanac" trophy/achievement.
Effect: Take 5% less damage from Mirelurk melee attacks.
Location: Northwood Ridge Quarry
The quarry has an interior area which is accessible through a door in the pool with the mirelurk eggs, north of the wooden bridge. There are more trappers hiding inside clear the area and loot the containers and corpses. The chamber also has a cooking station, armor workbench, and weapon workbench.

In the second floor, there’s a green trunk and on the small table beside it, you can pick up an issue of Islander’s Almanac. The powered building in the western side of the quarry has a fusion generator with a fusion core and weapons workbench inside.

Effect: 5% higher VATS chance against animals
Location: Brooke’s Head Lighthouse
An issue of Islander’s Almanac is found in the highest point of the lighthouse, on the counter beside the cooking stove.

Effect: Reveals key locations in the map
Location: The Last Plank (pub), Far Harbor
On the table where Old Longfellow is sitting the first time you met him. Almost impossible to miss.

Effect: Radiation-based damage reduced by 10%
Location: Acadia
This is found in the second lower floor, on the counter near the armor workbench.

Effect: Unlocks sludge-based recipes in the Chem Station
Location: National Park Visitor's Center
Inside the gift shop, there's an Islander’s Almanac on the counter, ground floor.
