Once upon a midnight dreary, Cameron Kaiser had spoken clearly: Is there any "Fudgie Shops" - erm, sorry; local term -- tourist shops in your area that would handle the "Yes and Know" series of books? They're still being produced - I seem them all the time in touristy areas 'round here (but remember, I work in the 3rd oldest city in the USA - Other than snow, all we _have_ are tourists... ;-/ IIRC, those books took the same type of marker. Of course, the price of the book & shipping then make it kinda outrageous for just a pen... On the investor side of things, wouldn't the book be worth more untouched? Or have some clues been revealed already? HTH, Roger "Merch" Merchberger -- Roger "Merch" Merchberger --- sysadmin, Iceberg Computers Recycling is good, right??? Ok, so I'll recycle an old .sig. If at first you don't succeed, nuclear warhead disarmament should *not* be your first career choice.

AFAIR they can also be read well when using a _bright_ 'warm' (yellowish) light, since the printed surface is different from the unprinted - or use a blue (UV) lamp, like available for bank note checking - here the sourounding light schould be not to bright. Also a damp/steamy athmosphere can reveal the content. In versions you can avoide to change the book. Gruss H. -- Ich denke, also bin ich, also gut HRK