Welcome. Sorry to hear about the issues, but again, not your fault. It is a comprehensive hobby and takes time to learn. I love actual books, so you can try Conscientious Marine Aquarist. Good one!
Welcome to R2R!!! Books are often out dated as the technology is constantly changing. Several reefers have already given you some great links to learn. I always refer new reefers to the 52 weeks of reefing from Bulk Reef Supply.
Welcome to Reef2Reef. Did you volunteer to take on the office reef tank or was it thrust upon you? Either way that's a lot of responsibility for someone who never did it before. Luckily you've come to the right place. Everyone here is very helpful and will be able to answer any question you will have.
Welcome to R2R. It’s a steep learning curve but take things slowly. No quick changes. Lots of knowledgeable and helpful people here who will support and advise you when needed.