One of the best gardening guide summaries I have ever seen was written by Baker Creek Seeds. A few years ago they sent me a printed copy with my seed order, and now they have put a copy online.
It’s certainly no substitute for a book on the subject, and it’s in no way complete, but at the same time it provides an introduction to all the important things you need to be thinking about to have a successful garden.
It’s a great reference for seed starting and transplanting dates, plant spacing and days to harvest for most vegetables.