foraging usually comes 4th out of 5 for me. Just takes a long time to grind it out. chopping the regenerating hardwood stumps in the secret woods (or forest farm, if you've got it) every single day can speed things up a bit as they're the most XP Valuable foraging action at 25 Per. But the 5000 XP to go from 9 to 10 would still take 200 stumps, and the woods only gives you 6 a day.
I think Woodcutter Weekly gives you 250, which is still 20 copies of the book. So don't hold your breath, it will happen it just takes a while.