Looks like in the photo the doors have weatherstripping to make a tight seal. Maybe an attempt to keep bugs out?
If you do that, everything must be bone dry before closing up, AND I would put moisture and odor absorbers in there.
Can't help you with exact plans, but if you want a good book, get "Making Flawless Cabinets and Built-ins" by Nick Engler. It covers many different designs, materials, tools, helpful hints, etc. It's not a big book, but it's surprisingly complete.
If you're worried about making mistakes in your own plans, don't. You WILL make mistakes. They WILL be agravating. And you WILL fix them.
If you think getting some pre-made plans will keep you from making mistakes, don't. Most plans have mistakes in them, and you will make mistakes not in the plans. Plus, I'd bet you're already thinking about making mods to this guy's plans...
I will admit though that for the inexperienced, seeing how someone else did it is an advantage, and a comfort too.