I would second the people suggesting both joining the Discord channel and watching the many videos posted on the YouTube channel. In the end architecture guidance really needs to understand your problem to give practical advice otherwise I'll just be suggesting stuff based on previous experience with my projects (which tend to involve large ERP systems).
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You did ask for books, so here are some books that I've read that helped me in my own journey.
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Enterprise Integration Patterns as others have mentioned is a good core book.
Enterprise Service Bus by David Chappel was a good one for me in 2008
SOA Patterns by Arnon Rotem-Gal-Oz was also solid however also from 2012