The boss collection log is a book that keeps track of all unique drops received from the Bosses listed in the Beasts tab as of 4 September 2017. All untradeable drops received before this date have also been kept track of. The log can be picked up next to Death in his office, behind the desk. Certain listed items dropped by non-boss monsters and other bosses count towards boss collections, such as: Coinshare drops are not counted towards your collection.