A Bruce Lee Praying Mantis-style Kung Fu book is among the top lots of an upcoming sale at Dreweatts & Bloomsbury.
It's expected to make ?�50,000-55,000 ($77,880-85,668) when it crosses the block in London on September 4.
The rare lot displays a number of diagrams and annotations in Lee's own hand, including the instructive: "Right hand block; left go over right and right pulls back immediately and punch out or back fist after swing."
It was given by Lee to his friend and fellow instructor Taky Kimura.
A letter written by Albert Einstein is offered with a valuation of ?�32,000-33,000 ($49,827-51,384).
It's written to a woman named Linda Crouse and shows his willingness to engage with his fans: "Dear Miss Crouse, Your questions are not at all silly.
"An object of not vanishing mass can approach but never reach the light velocity; the reason is that its kinetic energy must always be finite�Ǫ"
Other letters by Einstein have sold for exceptional sums at auction in the past, with one example that explains his feelings on religion selling for $404,000 in 2008.
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