Good afternoon,
Is it possible to use an indirect or similar function to look at different workbooks, as opposed to different tabs?

I want to be able to type in a workbook name in cell A1 which will tell a formula in B1 to look in the workbook which has the name that was typed into A1. I am familiar with using an indirect reference to accomplish this in searching different tabs within a workbook, however, I cannot figure out how to search through a different workbook.
This is the indirect that I have been using.

INDIRECT("'[nms2130.xls]" & $A$1 & "'!$c$27:$iv$27")

I would like to be able to type in nms2130 into A1 and have the formula in B1 refererence nms2130.xls or if I type nms2131 into A1, B1 references nms2131.xls

Any help would be greatly appreciated.