Halo: Contagio Purgatiio

 is an upcoming novella by Halo Fan Fiction user's, Joshua McCallan and Matthias Karlsson. It follows Lazlo-108 as he leads a small strike team of SPARTAN-II Class IIs, and SPARTAN-IIIs into a top-secret Covenant Research. However, once onboard the station, they soon realise things are not as they seem, and quickly, the SPARTANs face a new, unknown foe.