User blog comment:DisturbedDeaddMan/Spin-off Books Category/@comment-3452092-20190517213754/@comment-4786757-20190518022107

Well technically this still covers TRR with TC&TF and ROE with ES. ES & Hero are connected too. Buuuut officially TRR is technically only a spinoff of  ROE and NB of Bloodbound, with connections to the IL series.