Also towards the end of the century saw a renewed interest in trying to "authentically" recreate older drinks. Jeff "Beachbum" Berry released several drink books starting in 1998 (the "Grog Log", "Intoxica", and others) that contained researched recipes for many of the signature drinks from the sometimes shuttered bars of previous decades. This was also the beginnings of the "urban archeology" aspects of 21st century Tiki culture, based on historical interest and fueled by the "puzzle solving" of trying to discover secrets from the past from a cultural theme that was based in part on the "exploration" of tropical regions. Berry's work is considered to be one of the most important contributions to Tiki's renaissance.