This is one of the better U.S. based summer reading lists, but beware- it is enorrrmous!! Some will not be available in Ireland/UK yet but there are a good few that are and it is very wide ranging in it's suggestions. The link is at the bottom and running your cursor over each picture reveals a small summary. It covers beach reads, history and biography, young adult, lifestyle and quirky (! very LA).
http://www.latimes.com/entertainment/news/la-ca-0603-summer-reading-html,0,7303587.htmlstory for more suggestions