CCIE Routing and Switching volume 1 & (some chapters of volume 2) could be considered as an alternative.
OCG for Route does not cover the entire Blue print. Recently I did my Route exam…What I would suggest you is research topics according to Blue-print.
I haven’t gone through CCNP route course contents from networklessons.com. But this site has covered decent amount of knowledge to pass the exam.
Do online research for each corner case topics such AAA, DMVPN, NAT64,IP-SLA…
You should be fine.
The “How to Master” books have the same writing style as what I publish here on networklessons.com. The CCNP ROUTE book is like the CCNP ROUTE course. The course here however has more lessons, and includes some videos.