What are /r/Series7's favorite Products & Services?

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I had the honor and privilege to tutor some legendary bankers on the Series 79 when it first came out but that has been long ago so out of touch with that exam since it has been several years since I tutored or taught it.

This is the book I used as a supplement. I highly recommend it.

Investment Banking: Valuation, LBOs, M&A, and IPOs (Includes Valuation Models + Online Course) 3rd Edition (Wiley Finance) https://www.amazon.com/dp/1119706181/ref=cm_sw_r_apan_glt_fabc_GB2QJ8BDAHJRZH3Z89BB?_encoding=UTF8&psc=1