San Diego, CA -- (SBWIRE) -- 04/09/2012 -- An investigation for investors who purchased TZOO shares in February 2011 or earlier and hold any of those NASDAQ:TZOO shares was announced and NASDAQ:TZOO stockholders should contact the Shareholders Foundation. Read the full press release at http://www.sbwire.com/press-releases/travelzoo-inc-nasdaqtzoo-pre-feb-2011-investor-alert-investigation-over-potential-wrongdoing-135740.htm