• Good Charts* by Scott Berinato - great for deciding what visual to use when.
• Sketching User Experiences* by Bill Buxton - good for people wanting to learn how to flush out problems and low-fidelity design before investing in code/data and expensive prototypes.
• Visualizing Financial Data* by Julie Rodriguez and Piotr Kaczmarek - likely to be the premier text on this topic. Julie and I worked together at Fidelity way back...
• Change by Design* by Tim Brown (IDEO) - good for business leaders on how design is directly correlated to business impact
• Most texts by Edward Tufte - Edward's books usually come free with his lecture course if you can catch him on tour
• Most books by Stephen Few on dashboarding
• Storytelling With Data - Cole Nussbaumer Knaflic
• How Charts Lie* - Alberto Cairo
• Don't Make Me Think* by Steve Krug - a basic text about designing for the web (101-type text but can be good for totally new non-designers)

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