Collection samples

[GGn0]

Data sample proposal to Fix #7

[GGn0]

books.txt
authors.txt
You can use these two slightly modified files with mongoimport to view the data on your mongo instance
Also try this aggregation pipeline:

[
    {
      $match: {
        location: "Attic"
      }
    },
    {
      $lookup: {
        from: 'authors',
        localField: 'authors',
        foreignField: '_id',
        as: 'auths'
      }
    },
    {
      $project: {
        'title': 1,
        'authors': {$concatArrays: '$auths.name'},
        'generes': 1,
        'location': 1,
        'owner': 1,
        'reading': 1
      }
    }
]

[gmacario]

LGTM

[gmacario]

LVGTM

[alv67]

Starting from here is ok, modification request will eventually come as a task request.