There are differences to how Talis Aspire Reading Lists performs a Book metadata refresh and an individual item look up
Looks up the ISBNs for all book and chapter items without a Local Control Number (LCN) present in the item/bookmark metadata. This links the item to the library catalogue and availability.
Importantly if chapter details have been added prior to this action the chapter details are still present after the process is complete.
More details on this process can be found in this article on book metadata refresh
This function look up the given ISBN, LCN or DOI for an individual item from the edit metadata or edit bookmark screen, even if an LCN is already present. This links the item to the library catalogue and availability.
If a book item has chapter details prior to this action, you will lose this data as it overwrites the record completely. Until you click save when taking this action the book details will list in the chapter tab and the Is Part of tab is blank, once saved, it changes to a book item and chapter detail is removed.