??Curry: Foundations of Mathematical Logic, 2nd ed.

When browsing my favorite online bookseller's shelves I see that

this book is on sale (it's cheap enough without being on sale, for

that matter -- Dover edition, list US$12.95).

Question: Is this book (a) readable, and (b) currently relevant, or only

of historical interest? (My shelves are already overflowing).

Here is a data point on what I think is readable:

MacLane's "Categories for the working mathematician" is readable

(but hard).

John Velman