Virtual visits need to be arranged directly with the author or illustrator through their own web sites, which can be found using the links on this site's home page, but here is some general advice.
What do authors do on a virtual visit?
What you need for a Skype Virtual Visit
Feedback from schools
Here’s some feedback author Kerry Drewery received after one of her virtual visits
"It was a really successful and inspirational event both for myself and the staff and students involved. Kerry is a very open and approachable person which made the process very easy for both myself and the students involved, especially with this being our first attempt at using Skype. Her open and friendly manner encouraged our students to fully engage with her and ask the questions important to them. It was great for the students to see an author in their own environment and working space, as it is so rare that you get the opportunity to do so and it gave the chat a very personal feel, as it was tailored to the group of students and their work, which is often not achievable with usual author visits."
Garforth Academy, Yorkshire, UK
And here's some feedback I received after one of my own virtual visits
“We thought the session was fantastic - just what we needed, a real life author to give out the messages we continually say … It is a brilliant opportunity to speak with you virtually and move into the 21st century! … The session was very clear and just the right time for year 3.”
Corrie Primary School, Manchester, UK