With Messiler & Tarr, Housecroft & Sharp, and Shriver & Atkins all out of print, what is everyone doing? I'm debating just having students access the bootleg copy of M&T (5th ed) versus paying for a book or switching to Pfenning 2nd ed. (~$150 for e-book). Thoughts? Ideas? I'd prefer to keep the costs down but short of writing a text, not sure what the options are.