This is a lot of 2 box sets of cassettes of audiobooks by Kevin Trudeau.
~ "Mega Memory", copyrighted in 1991 by Nightingale Conant. This box set includes 8 double-sided cassette tapes, a 72-page workbook, and a 45-page pocket guide.
~ "Advanced Mega Memory", copyrighted in 1992 by Nightingale Conant. The Box Set comes with 6 double-sided cassette tapes, and 1 VHS tape titled "Never Forget Another Name" with an accompanying 45-page pocket guide and a 24-page workbook titled "Mega Memory Memory Builder".
These box sets are in good pre-owned condition, with writing on one page of one of the workbooks and untested.