IOI 2019 took place in Azerbaijan, from August 4-11, 2019. More info is available on the official website.
Just finished IOI 2019 in Azerbaijan
The 13th volume of the journal "Olympiads in Informatics" has been published, and it includes several research papers and reports.
You can find the contents by going to this page: IOI Journal - Contents.
Additionally, the agenda for the IOI Conference has also been published. The conference will take place during the IOI, in Azerbaijan.
You can see the agenda on the official website of IOI 2019.