Mastering the Core Teaching of the Buddha might be up your alley. I won't strictly "recommend" it, as the path it espouses is intense and engineered for enlightenment, which is (perhaps ironically) "no fun", in contrast to modern western mindfulness meditation with phone apps which is pleasant and relaxing but won't get you anywhere. But if you want results and are willing to put in the work (which is 1000x the effort of just reading the book), you could give MCTB a shot. Either that or join a Zen monastery for a couple years :)