Reddit mentions of The Essentials of Buddhist Meditation (Kalavinka Buddhist Classics)

http://www.amazon.com/gp/product/1935413007/

best of luck on your spiritual journey.

You might want to check out these two books written by Master Zhiyi within the tradition

The Six Dharma Gates to the Sublime

The Essentials of Buddhist Meditation

In addition, I think the documentary Amongst White Clouds deals with Tiantai (Tendai) Buddhist practitioners in the mountains of China

*edited because I accidentally submitted comment before adding film link

Ah, thank you. That's quite interesting!

The only English translation of Zhiyi's text I could find was this one. I wonder if there are any other translations; it seems like a pretty important text to be neglected until 2009.

If you want "esoteric" Tendai practices (Taimitsu) you will need a teacher to teach you. If you want to learn general Tendai/Tiantai practices here's a few resources

Some Tendai texts

http://www.bdkamerica.org/system/files/pdf/dBET_TiantaiLotusTexts_2013.pdf

Magnum Opus of Master TianTai ZhiYi founder of the Tendai Tradition

https://www.amazon.com/Stopping-Seeing-Comprehensive-Buddhist-Meditation/dp/1570622752

Master ZhiYi's shorter meditation manuals

https://www.amazon.com/Essentials-Buddhist-Meditation-Kalavinka-Classics/dp/1935413007/ref=pd_sim_14_2?_encoding=UTF8&pd_rd_i=1935413007&pd_rd_r=MADZDCZVVP6JYR4NQARA&pd_rd_w=W3kXn&pd_rd_wg=IRbmr&psc=1&refRID=MADZDCZVVP6JYR4NQARA

https://www.amazon.com/Six-Dharma-Gates-Sublime/dp/1935413015/ref=pd_sim_14_3?_encoding=UTF8&pd_rd_i=1935413015&pd_rd_r=MADZDCZVVP6JYR4NQARA&pd_rd_w=W3kXn&pd_rd_wg=IRbmr&psc=1&refRID=MADZDCZVVP6JYR4NQARA

Introductory book

https://www.amazon.com/Emptiness-Omnipresence-Essential-Introduction-Philosophies/dp/025302112X