Is it possible to merge values into a field instead of overwriting it?

[eunicode]

If we have a model Author that has an Authored Books field that can have links to multiple Book entries, is it possible to use update(), or another method, to add a book link to the Authored Books field, rather than overwriting it?

For example, if we have the following, can we add a book to the list?

Author: Dr. Seuss
Authored Books: ["Green Eggs and Ham", "The Cat in the Hat"] 

With update(), it overwrites the field:

// Simplified code 
cmaClient.entry.update(
  { entryId: 1 },
  {
    fields: {
      authoredBooks: { ["How the Grinch Stole Christmas"] }
  }  
)
  
// Results in 
Authored Books: ["How the Grinch Stole Christmas"]
instead of
Authored Books: ["Green Eggs and Ham", "The Cat in the Hat", "How the Grinch Stole Christmas"] 

It seems I could use get() in combination with update(), and use the spread operator, but is it possible to do it with one API call?

EDIT: This issue is similar to another issue I opened, so closing this one.