[PubQ] When to query next thing...full ms still out with agents
So, I have been querying since around January, sending in batches to agents in the UK and US. I have received 4 full requests, two of these have sent kind rejections (solid writing, good concept and plot, just didn't give them that 'must have' feeling). So I have two fulls remaining out there; one of these agents is currently not in work due to personal circumstances, but has not closed to queries. The other has said it will take them approx. 3-4 months to read the full.
I have been writing the next book since I started to query and it is almost ready - it has been beta read, and I'm on my second edit. I love this book and think it is hookier than the book I've already queried.
My question is - can I query it once it is ready, despite book 1 still being under consideration? Or should I withdraw book 1 before querying book 2?