Hello Ken,
Thank you for contacting Infragistics Community!
I believe you will find the Dependencies section of the Spreadsheet topic in our documentation very helpful. As stated there in order to install the igniteui-angular-excel package the following command has to be executed:
npm install --save igniteui-angular-excel
Here you can find all available versions of this package.
Please let me know if you have any further questions!
Best Regards, Martin Evtimov Associate Software Developer Infragistics, Inc.