Well I'll give it a go, "officially" you'd have Dark Horse's Buffy Season 8, IDW's Angel: After The Fall (along with Spike: ATF,) and the 8 part IDW Spike solo series
For the best reading order I'd say read the Fray TPB first if you haven't already.
Then Angel: After The Fall, this is split into 4 TPB's and Spike:ATF making 5 all together (there is a big collection of all 4 A:ATF's you can get too)
Angel: After Fall v1 first, then v2, then Spike:ATF, then Angel v3 and v4
*Then* you can keep reading the following IDW stories if you want, some are good fun, some not so much. They're not really 100% canon, Dark Horse is treating them like "maybe they happened, maybe not, either way we're not really gonna be mentioned too much from then anyway."
The one arc immediately following ATF, Aftermath, is awful! So much so the writers of the following arcs ignored most of it and retconned the rest.
Vol.6 'Last Angel in Hell' isn't bad, there's a nice ATF epilogue story in it, a Drusilla 2 parter, and a fun Angel & Spike at Comic-con tale. Then there's three more Angel books- Immortality For Dummies, The Crown Prince Syndrome, and The Wolf, The Ram and the Heart.
And there's a also an Illyria miniseries too.
Oh yeah and there's a little Lorne one shot too, which basically just has Lorne written out of the series because of Andy Hallett's death.
Then there's the Spike series, which is considered pretty much canon, simply called 'Spike.' This is available as either two Hardcover volumes, or they've recently released a full TPB collection of it.
Then after those start on the Buffy Season 8 stories (all the Angel & Spike stories take place before it.)
These are available as 8 TPB's. Though recently the big Library editions have started to be released, which sounds like what you've got. These are just a big hardcover with 2 TPB stories in each, so they'll be 4 by the end. Only one has come out so far so either you wanna wait till they all come out or just make a start of the remaining TPB's (vols 3-8)
The two Willow and Riley one shots are included in the TPB's so don't worry about those.