Are these books a well kept secret?

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A couple of books I've really enjoyed:

Jazz Guitar School by Ike Isaacs (International Music Publications - first published in 1987)

Exploring Jazz Guitar by Jim Hall (Hal Leonard - 1990)

I've looked for them in this Forum's Search but nothing came up; does anyone else have them? I didn't check online (Amazon etc.), but perhaps they're out of print (Ike Isaacs most probabily is...)?

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