Minecraft 1.3.3 [ Prerelease 3 ] 12w17a - JKoop

Here is the development snapshot of week 17, 2012! This week list of changes:
1. Added editable books

2. Wooden half slabs in four colors (and they act as wood instead of stone)

3. Bug fixing and tweaks, notably about entity collisions, ΓÇ£picking blocksΓÇ¥ (creative mode), and chat

4. Some other, censored stuff
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INSTALL INTRUCTIONS
Windows-

1. Type %appdata% in the search bar

2. .minecraft/bin

3. change your current .jar file to whatever you like ( Example: minecraft1.1.jar )

4. now just change the current .jar file that you downloaded to minecraft.jar

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MAC -

1. goto Finder/User/Library/Application Support/minecraft

2. FOLLOW STEPS 2-4 above.