I used this as my guide when creating this app.

     A  Summary of the Guardians API there's a few nifty methods
     I will use. It has five end points namely:

     We provide several endpoints to retrieve different items:

     Content
     Tags
     Sections
     Editions
     Single item

     ### Content(q)
---
     The content endpoint (/search) returns all pieces of content in the API.

     ##Query operators
--
     The q parameter supports AND, OR and NOT operators.

     ##Filters operators
--     
     Some filters support AND, OR and NOT operators through a a specific syntax:

     AND: ,
     OR: |
     NOT: -
     Expressions can be grouped using ().

     ### Phrase search

     You can also use double quotes to search for exact phrases.

     ## Tags
---
     The tags endpoint (/tags) returns all tags in the API.
     All Guardian content is manually categorised using these tags,
     of which there are more than 50,000.

     ### Editions
---
     Editions are the different front main pages of the Guardian site we have.
     At current we have editions for the United Kingdom, the United States and Australia.

     ### Sections
---     
     The sections endpoint(/sections) returns all sections in the API.
     We use sections to logically group our content.

     ### Single item
---     
     The single item endpoint returns all the data we have for a given single item id.