Hotels in Zurich, Basel and Amsterdam were booked through Janet Redler Travel located in the UK. They also made the arrangements for train travel from Zurich to Basel. https://www.janetredlertravelandtourism.co.uk/
Best Things To Do in Sicily with Rosella and Gianca https://bestthingstodoinsicily.com/
You, Me and Sicily https://www.youmeandsicily.com
And high marks for the Rick Steves Tours https://www.ricksteves.com/
Rhine River Cruise: Basel to Amsterdam vikingrivercruises.com
Packing List from Travel Girl Fashion website https://docs.google.com/spreadsheets/d/1pdg_OFQ-TurlUiovCP2a80jWltSMWDcFrwVDsT-9pdA/edit?ck_subscriber_id=4034473461&pli=1&gid=0#gid=0