Hi, welcome to New England. What kind of gardening are you interested in? Perennials, Vegetables? What did you do when you lived in California? Do you know what zone you are in here yet? Will you be gardening in an urban area or suburban?
There are a lot of books on gardening in New England. Before Gardenweb became associated with Houzz, there used to be a different format and access from the NE forum to files that were saved, one of which was an extensive book list. Claire had been here the longest, maybe she will see this and have some idea where you can find that list now.
Here's a link to one...
New England Month by Month
Oh, I found a link to the thread, I was thinking of that had the list of books from this forum.
NE Gardeners Book List
Q