The Architecture of Open Source Applications

http://www.aosabook.org/en/index.html

Hey, at least it's free.

There are two kinds of free information:
1. made free by big corporations (like JAVA's documentation), who wants brainwashed workforce.
2. released by people who believe in their cause (like PCL book) with intention of enlighting people.

And I may say, that AOSA was represents the third kind - advancing bad design agenda. Just look at http://www.aosabook.org/en/wesnoth.html
The word "Elf" was repeated SIX fuckin times for the fuck's sake!!!

[unit_type]
    id=Elvish Fighter
    name= _ "Elvish Fighter"
    race=elf
    image="units/elves-wood/fighter.png"
    profile="portraits/elves/fighter.png"
    hitpoints=33
    movement_type=woodland
    movement=5
    experience=40
    level=1
    alignment=neutral
    advances_to=Elvish Captain,Elvish Hero
    cost=14
    usage=fighter
    {LESS_NIMBLE_ELF}
    [attack]
        name=sword
        description=_"sword"
        icon=attacks/sword-elven.png
        type=blade
        range=melee
        damage=5
        number=4
    [/attack]
[/unit_type]