There is a great wealth of user guide information written to help you with your game, for those of you new to the game and those of you who are much further along with your game. The user guides will provide you with a broad spectrum of information, across many subjects., written to help you with your game and the long term development.
The user guides will provide you with information, guidance, advice, prices (planes, structures, helicopters, bonus), flight locations, the space program, the world map of locations, the airship store, the game store, the on screen game counters and icons explained.
There are also a 'How To' series of user guides e.g. design your signature page, obtain gold tokens and silver tokens, take screenshots of your game, contact tech support for help, collect green notes, obtain different types of game bonus, obtain different types of maps, obtain MB chest's and MSB chest's, sell your surplus structures, increase your city population capacity, increase your city electricity capacity, passenger capacity, create a forum members alliance group, join a forum members alliance group and obtain game updates.
The user guides (from Capt WH Rollins) can be located HERE.
There are also general guides from other forum members that you might find interesting that can be located HERE.