Prima Games have announced that they will publish the official Splatoon 2 game guide in July, when the game launches on the Switch.
The 240-page guide will include pretty much everything you need to know about the game, including all of the maps, weapons, characters, etc. It also has a complete guide for the singleplayer portion of the game.
See also: Splatoon 1 Amiibo will work with Splatoon 2
Finally, the Splatoon 2 guide includes what most gamers want from the guide: multiplayer strategies and tips on how to become a great Splatoon 2 player.
The guide launches in July 21st, same release date as the game. It retails for $11, you can pre-order it here.