Sugar Surfing is probably the easiest read, and was a lightbulb moment for me. I went through 20 years of terrible control (dx T1 in 1986) and until 2014, was quite literally clueless about diabetes. Think Like a Pancreas, Sugar Surfing and Pumping Insulin were life changers for me. No need for a pump or CGM (if you don't have them), as an excellent intro and if you can implement without either then you have the foundations for everything you need IMO! Sadly I was to late, and ended with Stage 5 Renal failure, and am now post (SPK) translant, but wish more than you can believe I had been exposed to these decades ago! Not been on here for a few years but happy to help if you have any questions