The reclaimed peel and stick solid wood wall paneling concept was exactly what I was looking for.   The backing is super sticky.  They haven’t fallen off so far.  Hopefully I won’t need to follow up with screws.  The colors are a little off from what the box says it is.  I’m not sure where the black or cream is on the boards.  There is a decent mixture of colors so it still looks good.  I had to order a couple more boxes to complete the job.   Make sure you measure accurately and allow for some extra boards so you have enough to cut up.