read.xlsx.multi: Read Multiple Excel workbooks
In debarros/dbTools: Functions From de Barros

Read all the xlsx files in a folder that have filenames matching a given pattern and return a single data.frame

read.xlsx.multi(
  folder,
  sheet = 1,
  pattern = NULL,
  dupVar = NULL,
  orderBy = NULL,
  decreasing = T,
  messageLevel = 0
)

`folder`	character of length 1 with the address of a folder
`sheet`	integer or character of length 1 indicating the worksheet to use
`pattern`	character string containing a regular expression to be matched in the given character vector. Coerced by as.character to a character string if possible. If a character vector of length 2 or more is supplied, the first element is used with a warning.
`dupVar`	character of length 1 with the name of a variable for which duplicates should be dropped
`orderBy`	character of length 1 with the name of a variable by which to sort the result
`decreasing`	logical, should ordering be done by decreasing values?
`messageLevel`	integer, the level of messages that should be printed to the console