I'm looking for good intro texts involving astronautics and rockets. I found Understanding Space: An Introduction to Astronautics (https://www.amazon.com/LSC-Understa...TF8&colid=3K55W1C0QSEK0&coliid=I26Q0UB38SWRCU), but from the table of contents, it doesn't look very technical. I'd like to find something technical that goes over a lot of the math required. For rockets, I found Introduction to Rocket Science and Engineering (https://www.amazon.com/Introduction...8&colid=3K55W1C0QSEK0&coliid=I2STWN7HGS46TN); however, I haven't seen much on this text other than the "NASA Cover Up" review on Amazon (US). Any suggestions are greatly appreciated.