We cover neither PDE, nor BVP.
Note that you can buy either a paper textbook in store or a digital copy from Wiley (see references). And those are not sold out. According to the poll, 84% of respondents got a digital edition (pdf).
Also, exposure has not changed much from, I would say 6E, or may be even earlier, but problems were added, removed, shaffled. However all home work assignment problems will be available on Quercus, so if you can get cheaply an earlier edition, you'll be fine