My I am building concentration towards the Jhanas. I have experienced it once, been to Access Concentration many times. Mostly Culadasa's The Mind Illuminated (maybe there are newer editions than the one linked) and Daniel Ingram's Mastering The Core Teachings of The Buddha.
https://archive.org/details/the-mind-illuminated-culadasa-john-yates-matthew-immergut-jeremy-graves