Lily King’s EUPHORIA — one of our Publishers Lunch Spring/Summer Buzz Books — tops Amazon’s best books of June list as their Spotlight pick, along with Courtney Maum’s I AM HAVING SO MUCH FUN WITHOUT YOU as the Featured Debut. More curious, however, is that two of the titles the bookseller’s “editors have hand picked as this month’s best” are not actually available for sale on the site: Megan Abbott’s THE FEVER (Little, Brown) and Tom Rob Smith’s THE FARM (Grand Central) are “currently unavailable” as part of Amazon’s standoff with Hachette Book Group.