This kaggle competition is part of the "Recommender Systems" course at Sofia University, FMI, 2022 year.

The domain of the competition is books recommedation as you have data about:

Users - id, location, age
Books - id, title, author, year, publisher
and you have ratings from 0 to 10 which user id gave to book id

Users and Books files are the same for training and testing as
for training you have 862,335 ratings which the users gave to the books  and for testing you have 287,445 ratings which you need to predict.

The expectation is that you will try content based, collaborative filtering and/or hybrid approach as the evaluation will be with RMSE.