Adirondack coffee table

Hello,
There is Ana'a plan for Adirondack end table but that is little to small for me (14.5"x14.5").
In the cover picture of design plan for Adirondack chair for HD there is table that looks just right for me. Is the plan for this table available anywhere? Or some other similar Ana's endtable? If not can someone recommend another simple plan to make outdoor coffee table?
Thanks,