We will be visiting in April of 2018 (4 adults) and would like to know a reputable and reliable source for private and semi-private guided tours in Seville. In Barcelona there is the tour guide bureau, which i have found to be very helpful. Thanks for any info fellow travelers!
Rick Steves' Spain guidebook has good recommendations.
We were in Seville three weeks ago and we were very pleased with Naturanda. We used them for a small-group tour to Jerez de la Frontera and Cadiz. It was just us and one other couple - an excellent day.
Sevilla snapshot or Spain guide has some I cannot remember the names but they are in there.
My daughter and I spent a day on two tours with RS-recommended Concepcion ("Connie") -- we just showed up at the meeting point at the time listed in Rick's Spain book and were lucky to find space on her tour.
Thank you all for responding to my question!