was released this week in the UK. The tracks cover his entire career including the Jeff Lynne co-written Cry Baby Cry (1975) and co-written and produced Walk Away from 1989.
One development here is that this is the first time Cry Baby Cry is available for digital download in case you're interested in building a rarities library and don't have this one yet.
Otherwise, this CD is the leading Del Shannon beginner's collection.
(Hat Tip: Euan)