Staying on for G437 in Spring?

Unfortunately, the book I would like to use, Weather Maps: How to Read and Interpret All the Basic Weather Charts by Peter Chaston, is long out of print (both the 3rd and 4th editions) -- and now selling for over $100 on Amazon!  However, the author has copies of the 4th edition, for $39.

I haven't yet decided if that expense is worth it for all of you.  In the meantime, if you find a cheap copy of either the 3rd or 4th edition (under $30), BUY IT.  It's a great reference book.  (I'd skip the 2nd edition, as it's a bit smaller and is also quite dated.)